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Overclocking my ASUS DirectCU 5850

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  • Overclocking
  • Asus
  • GPUs
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Last response: in Graphics & Displays
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June 4, 2010 1:36:36 AM

My ASUS DirectCU 5850 finally came in today and I've spent the better part of the day overclocking it. Some of my results are expected, and others I just don't understand. I thought I'd post my findings here with the hopes that more experienced forum members might have some additional insight that might help me achieve a higher and more stable overclock. I've been using the following guide to help me overclock my GPU:

http://www.overclock.net/ati/633816-how-overclock-your-...

I wasn't quite able to reach my personal goal of a 1050MHz overclock, but I was able to run 1000MHz stable in GPUTool.

Overclocking GPU

Highest stable GPU Clock: 1000MHz @ 1.25V (used ASUS SmartDoctor to adjust voltage for this one)

Overclocking Memory

Highest stable memory clock: 1300MHz

Overclocking GPU and Memory

Highest stable GPU/memory combined clocks: 980MHz clock with 1300MHz memory at 1.218V

Other Notes

In addition to using GPUTool, I ran a substantial number of benchmarks using Furmark with Xtreme Burning Mode, Displacement mapping, Post FX, and 8xMSAA sampling. Unfortunately, what GPUTool thinks is stable is not even remotely okay with Furmark. Attempts to test stability in Furmark with my highest stable GPU and Memory overclock ended with my GPU reaching a temp of 104C before the drivers failed. GPUTool on the other hand never peaked above 82C. Preliminary testing with Furmark has my highest stable overclock so far at 950 with a voltage of 1.718V. This is my second time writing this post as my last test with Furmark resulted in a driver crash my system did not recover from.

Increasing voltage didn't help me reach a much higher overclock. I was able to get to 930Mhz clock on stock settings, and grab another 50MHz with the next .05, but any attempts to go over 1000MHz resulted in a driver reset. Voltages between 1.25 and 1.3 all behaved the same. I didn't go higher just to be safe.

More about : overclocking asus directcu 5850

a b U Graphics card
June 4, 2010 3:17:29 AM

Most cases ive seen of stable OC's for 5850's are just over 900 to the 950 range range with what seems to be about 10-15% hitting the 1000 hit. I think you are sitting pretty well considering.

Personally i had so many problems with asus smartdocter it wasnt even funny. If you crashed during a game ( which you will more then likely, cus furmark will not cause a crash with all the settings on and in extreme burning but a 3 year old game will ) smartdoctor likes to reset everything you did on a reboot. Yes i know you can set it to boot up at the last settings but honestly, it just seems like a shitty OC tool overall.
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June 4, 2010 4:08:01 AM

Well first of all 1300mhz GPU RAM is retardedly good. That's amazing. I'd like to see some benchmarks of that. Mine get's artifacts over 1220.

The voltage control is only for core, you can't modify the ram volts.

My absolute maximum OC has been 985/1200 at 1.225V. I tried up to about 1.35V for 1000 core but it's just not stable. I've never used that GPU tool but FurMark is a good stability test for sure.
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June 4, 2010 7:27:31 AM

thats an impressive memory speed, just remember that even if the RAM isn't stable it won't show error's (Artifacts) as you would expect.

Good core clock/voltage too. :) 
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June 4, 2010 3:57:05 PM

Im considering getting the same 5850 just so I have the option to overclock. Im interested to see in detail how much difference OCing makes (to performance and heat). I dont think I'll overclock at first, but if a game comes along that needs that extra umff to play nicely, Id probably do it then. :D 
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June 4, 2010 6:49:42 PM

Rustyy117 said:
thats an impressive memory speed, just remember that even if the RAM isn't stable it won't show error's (Artifacts) as you would expect.

Good core clock/voltage too. :) 


What kind of errors should I expect to see if the RAM isn't stable? I'm a bit shocked that I didn't see any artifacts at 1300, and I know with CCC I can probably get that number even higher if I really want to. Is it possible that overclocking my processor will help with stability of the system (driver reboots) at 1000MHz core clock?

ashkaji said:
Im considering getting the same 5850 just so I have the option to overclock. Im interested to see in detail how much difference OCing makes (to performance and heat). I dont think I'll overclock at first, but if a game comes along that needs that extra umff to play nicely, Id probably do it then. :D 


I definitely recommend the card. Even though I didn't hit my own target goal, I have a solid stable overclock that's about 30% more than stock. I'll post some temperature and benchmark information once I've got a final overclock.
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June 4, 2010 7:19:49 PM

Basically GDDR5 memory can detect error's (caused by instability) and re-send the data again until it succeeds without error, the resending of data takes time, and so will loose you performance. Obviously the more unstable the memory the more times it will have to re-send data.

This explains it better than me....

GDDR5 memory controllers can perform basic error detection on both reads and writes by implementing a CRC-8 hash function. With this feature enabled, for each 64-bit data burst an 8-bit cyclic redundancy check hash (CRC-8) is transmitted via a set of four dedicated EDC pins. This CRC is then used to check the contents of the data burst, to determine whether any errors were introduced into the data burst during transmission.

The specific CRC function used in GDDR5 can detect 1-bit and 2-bit errors with 100% accuracy, with that accuracy falling with additional erroneous bits. This is due to the fact that the CRC function used can generate collisions, which means that the CRC of an erroneous data burst could match the proper CRC in an unlikely situation. But as the odds decrease for additional errors, the vast majority of errors should be limited to 1-bit and 2-bit errors.

Should an error be found, the GDDR5 controller will request a retransmission of the faulty data burst, and it will keep doing this until the data burst finally goes through correctly. A retransmission request is also used to re-train the GDDR5 link (once again taking advantage of fast link re-training) to correct any potential link problems brought about by changing environmental conditions. Note that this does not involve changing the clock speed of the GDDR5 (i.e. it does not step down in speed); rather it’s merely reinitializing the link. If the errors are due the bus being outright unable to perfectly handle the requested clock speed, errors will continue to happen and be caught. Keep this in mind as it will be important when we get to overclocking.

So your RAM as 1300Mhz could be effectively slower than if it was running at 1200Mhz

When I was testing for my max RAM overclock on my 5850, I used the resident evil 5 benchmark to see when I would start to loss performance due to unstable RAM. Here is what I found.

Resident Evil 5 maxed out 1280 x 720 DX10

1000/1200Mhz 141.7FPS

1000/1250Mhz 138.7FPS

1000/1150Mhz 141.2FPS

So this told me that my 5850's RAM at 1250Mhz was unstable as I got a deduction in FPS compared to 1200Mhz.

Hope that helped.
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June 4, 2010 8:22:52 PM

Rustyy117 said:

Resident Evil 5 maxed out 1280 x 720 DX10

1000/1200Mhz 141.7FPS

1000/1250Mhz 138.7FPS

1000/1150Mhz 141.2FPS

So this told me that my 5850's RAM at 1250Mhz was unstable as I got a deduction in FPS compared to 1200Mhz.

Hope that helped.


I wouldent have thought about that at all! +1 Great info!
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June 4, 2010 9:02:00 PM

My DirectCU maxes out at 1060/1310 1.28v but since I see no perfromance gain I just leave it at 1000/1250 1.22v with load temps of 68c max unless running kombustor extreme burn-in. Here are some screenies :

IDLE @ 1.2v :



IDLE @ 1.25v :



Quick Bench @ 1.25v :



I cannot locate my extreme-burn-in screenie but it topped out at 79c after 10 minutes @ 1050/1300 1.26v.

Here is a Heaven Bench @ 975/1250 :





I also re-pasted the cooler with MX-2 and saw an improvement in temps by -2/-3c. The paste that comes with the DirectCu is garbage, when I removed the cooler I found out that the paste was not spread evenly and in-turn gave me an idle temp of 36-37c.
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a c 124 U Graphics card
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June 4, 2010 10:12:01 PM

omgitzfatal: Great info!!! Wow that explains a lot... I was trying to do just a little overclock tweaking so I had the RAM at I think it was 1213 but the fps in Crysis benchmark were worse! I'll have to keep working on it, maybe try 1 mhz increments from 1200 to 1210 and see where it appears to top out.

As to general overclocking tips, I investigated the effects of having 4xAA on in FurMark on gpu core and memory speeds. With AA turned off, only core speed would increase FPS, but with 4xAA, the only thing that increased FPS was memory speed while core didn't make the slightest impact on average FPS. It did slightly help the min by maybe 1-2.
x-axis: core. y-axis: fps. z-axis memory
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June 4, 2010 11:12:52 PM

Rustyy117 said:
When I was testing for my max RAM overclock on my 5850, I used the resident evil 5 benchmark to see when I would start to loss performance due to unstable RAM.


Is there a reason you chose RE5 to test this? Would any other benchmark be sufficient or only specific ones?

OvrClkr said:
My DirectCU maxes out at 1060/1310 1.28v but since I see no perfromance gain I just leave it at 1000/1250 1.22v with load temps of 68c max unless running kombustor extreme burn-in.

...

I also re-pasted the cooler with MX-2 and saw an improvement in temps by -2/-3c. The paste that comes with the DirectCu is garbage, when I removed the cooler I found out that the paste was not spread evenly and in-turn gave me an idle temp of 36-37c.


Do you actually run your card on a regular basis with 1000/1250 1.22V? I would love to run mine like that if I could get it stable at 1000MHz consistently. I've thought about repasting my own cooler, but considering I just got the thing, I'm a little worried about voiding the warranty. I was also planning on selling it in a year or so to help with an upgrade to a better card.

wolfram23 said:
x-axis: core. y-axis: fps. z-axis memory
]http://i746.photobucket.com/albums/xx103/Wolfram23/th_memandcorespeedvsfps.png


Try as I might I just can't seem to understand this graph. It looks as though your best performance is at lower memory and lower clocks with 1000MHz memory speed being the best setting since it gives 50 FPS across the board. How is this graph supposed to be interpreted?
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June 4, 2010 11:24:19 PM

Sorry Slayer. Here's the whole post on it with explanations etc
http://www.tomshardware.com/forum/259144-29-antialiasin...

I just got bored when I was doing it and didn't feel like running another 5 tests when I could already see a clear trend so the graph is a bit screwy lol.
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June 5, 2010 12:20:04 AM

wolfram23 said:
Sorry Slayer. Here's the whole post on it with explanations etc
http://www.tomshardware.com/forum/259144-29-antialiasin...

I just got bored when I was doing it and didn't feel like running another 5 tests when I could already see a clear trend so the graph is a bit screwy lol.


Okay, now I understand it. I didn't realize that the graph looked like that because it was missing data points. That's an interesting point and one I'll definitely keep in mind.

Another couple things I've noticed:

1. When I have afterburner on, the card no longer downclocks when dealing with less graphics intensive processing. Is there a way around this?
2. ASUS SmartDoctor and Afterburner both start with the system and I haven't been able to find out how to disable this functionality. Is uninstalling them the only way?
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June 5, 2010 12:28:18 AM

Slayer697 said:
Do you actually run your card on a regular basis with 1000/1250 1.22V? I would love to run mine like that if I could get it stable at 1000MHz consistently. I've thought about repasting my own cooler, but considering I just got the thing, I'm a little worried about voiding the warranty. I was also planning on selling it in a year or so to help with an upgrade to a better card.


I run it at 1000/1250 1.22v when I play BF2 which is everyday after work, if I am not playing I switch OC profiles and go down to 950/1175 1.8v and it stays relatively cool considering its "over-volted".

What driver are you using? What are your load temps when stressing @ 100%? Why sell when you can cross-fire?
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June 5, 2010 12:36:59 AM

Slayer697 said:
Okay, now I understand it. I didn't realize that the graph looked like that because it was missing data points. That's an interesting point and one I'll definitely keep in mind.

Another couple things I've noticed:

1. When I have afterburner on, the card no longer downclocks when dealing with less graphics intensive processing. Is there a way around this?
2. ASUS SmartDoctor and Afterburner both start with the system and I haven't been able to find out how to disable this functionality. Is uninstalling them the only way?


I have both programs running in the background and have no issues whatsoever, as long as you click on the "apply overclocking at startup" on AB you should be good to go. If you do not want AB to start then un-check the "apply overclocking at startup" and your done. You need doctor in order for the card to work properly.
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June 5, 2010 12:43:01 AM

OvrClkr said:
I run it at 1000/1250 1.22v when I play BF2 which is everyday after work, if I am not playing I switch OC profiles and go down to 950/1175 1.8v and it stays relatively cool considering its "over-volted".

What driver are you using? What are your load temps when stressing @ 100%? Why sell when you can cross-fire?


I'm using Catalyst 10.5. What app do you want you want me to stress test with? I want to sell because I probably won't be able to sell cross-fired 5850s in two years, but I might be able to sell the one 5850 in a year. It really depends on the cost of upgrade and whether or not keeping the 5850 will be more useful to me.

OvrClkr said:
I have both programs running in the background and have no issues whatsoever, as long as you click on the "apply overclocking at startup" on AB you should be good to go. If you do not want AB to start then un-check the "apply overclocking at startup" and your done. You need doctor in order for the card to work properly.


What do I need to keep doctor open for? I don't mind afterburner, but doctor keeps giving me a message every time I start my computer about some other program I didn't install. I don't want to uninstall it, but I don't want it to open up on startup.
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June 5, 2010 2:33:19 AM

Slayer697 said:
Okay, now I understand it. I didn't realize that the graph looked like that because it was missing data points. That's an interesting point and one I'll definitely keep in mind.

Another couple things I've noticed:

1. When I have afterburner on, the card no longer downclocks when dealing with less graphics intensive processing. Is there a way around this?
2. ASUS SmartDoctor and Afterburner both start with the system and I haven't been able to find out how to disable this functionality. Is uninstalling them the only way?


If you run an overclock using Afterburner it won't downclock it. If you set the speeds back to default tho, then they'll drop down at idle. The way you get around it is to BIOS flash your video card so that it's 3D mode is whatever your overclock is and then it'll still run normal downclocks - if you use RBE you can custom set clocks and volts and all that stuff. You can even make it so that in ATI Overdrive you can OC to 1100/1300 if you want - not that those would necessarily work lol.
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June 5, 2010 9:03:53 AM

It doesn't have to be resdient evil 5 benchmark, it can be any 3d benchmark, aslong as the scores don't vary to much, for example, Dirt 2's benchmark varies alot from 1 run to another (using the same settings and overclock)

Something like Crysis benchmark would work well...

Nice info Wolfram23 :)  Ialso found that increasing the memory speed helped my minimum FPS

Crysis All very high DX10 1920 x 1080 noAA

1000/1150 Min: 26.54 Max: 45.91 Avg: 40.98

1000/1200 Min: 30.81 Max: 46.54 Avg: 41.365

Thats over a 4 FPS gain in minimum FPS! Peachy :) 
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a c 126 U Graphics card
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June 5, 2010 9:05:28 AM

Oh and slayer I've done what Wolfram23 said with RBE, if you want to do it then I can help you out if you want.
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June 5, 2010 6:14:32 PM

Rustyy117 said:
Oh and slayer I've done what Wolfram23 said with RBE, if you want to do it then I can help you out if you want.


Will doing this void my warranty? Will it help me get a more stable overall overclock?
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a c 126 U Graphics card
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June 5, 2010 6:32:04 PM

Yes I think it does void your warranty, but overclocking does that for you already...

Yes it will help you get more stable overclocks because you can change the 3D voltage, but the main reason I did it is so that my card down clocked it self when in 2D mode and I also didn't have to mess around with programs and profiles.

To test my Core overclock I used Crysis benchmark tool for about 2 hours, stress testing the memory is harder as there is no visual indication as to whether or not your memory is unstable (E.g. Artifacts) So I used Resdient Evil 5 for that, although I could have used Crysis, but I got bored of looking at Crysis...

When It comes to finding your highest stable memory frequency run a benchmark at stock memory speed, note the results and then up your memory speed by 50Mhz and run the same benchmark again, do this process until your score gets worse at which point you've found where your memory is unstable, then reduce your memory speed by 50 Mhz and your done.

You could say "well my memory is stable at 1250Mhz, but not at 1300Mhz so I'm going to run the benchmark again at 1260Mhz and see if its stable". That way you'll find the exact point where your memory is unstable.

EDIT: Just to say that you can use pretty much any 3D app or game to test the Core stability E.G... Furmark, ATi tray tools, 3Dmark, game benchmarks, just playing a game.... ETC
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a c 124 U Graphics card
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June 5, 2010 6:53:43 PM

Just to add on, as you probably know from the link about the AA and memory speed, you can run FurMark with 4x or 8xAA to test memory as well. I reflashed my cards now to 885/1220 and so far so good, although I had a crash after several hours in STALKER yesterday but I'm not sure it was the video card... gotta keep testing.
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June 5, 2010 7:30:59 PM

Slayer697 said:
I'm using Catalyst 10.5. What app do you want you want me to stress test with? I want to sell because I probably won't be able to sell cross-fired 5850s in two years, but I might be able to sell the one 5850 in a year. It really depends on the cost of upgrade and whether or not keeping the 5850 will be more useful to me.



What do I need to keep doctor open for? I don't mind afterburner, but doctor keeps giving me a message every time I start my computer about some other program I didn't install. I don't want to uninstall it, but I don't want it to open up on startup.


You need to make sure you have both Doctor and Gamer OSD installed if you want the card to work properly.




Use furmark or kombustor (Afterburner) to stress your GPU.


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June 5, 2010 7:34:49 PM

wolfram23 said:
If you run an overclock using Afterburner it won't downclock it. If you set the speeds back to default tho, then they'll drop down at idle. The way you get around it is to BIOS flash your video card so that it's 3D mode is whatever your overclock is and then it'll still run normal downclocks - if you use RBE you can custom set clocks and volts and all that stuff. You can even make it so that in ATI Overdrive you can OC to 1100/1300 if you want - not that those would necessarily work lol.


Of course it will down-clock, but in order for this to occur he needs to first make sure that he has the correct programs installed in order for the GPU to work properly. Here is an example of me using AB to overclock the card, you can see how it is running at 157/300 :

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June 5, 2010 7:42:06 PM

OvrClkr said:
You need to make sure you have both Doctor and Gamer OSD installed if you want the card to work properly.


I'm still not sure I understand why I need doctor installed. I'm able to adjust voltage frequency with Afterburner anyway. Doctor is overall a pretty awful program and I'd like to get rid of it unless you can explain why you say I need it installed.
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June 5, 2010 7:51:50 PM

Have you tried running the card without having Doctor or OSD installed? I did and the card went nuts. Anyways I dont see any issues by having all 3 programs installed, if you want to try to test the card with AB only then go ahead and let us know the outcome.
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June 5, 2010 7:54:40 PM

I've read that using more programs than AB to overclock your card can cause conflicts, So I would advice to just use AB or Edit your BIOS with RBE...
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June 5, 2010 8:03:04 PM

He doesn't need to edit the Bios, if he wants to use AB only he will need to edit the .cfg file located in the AB folder in order to unlock the voltage control. (edit the .cfg file to allow "UnofficialATiOverclocking from 0 to 1", save then overclock and you are done.
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June 5, 2010 8:10:29 PM

Rustyy117 said:
I've read that using more programs than AB to overclock your card can cause conflicts, So I would advice to just use AB or Edit your BIOS with RBE...


This is what I was concerned with. Yes, I've tried running without doctor installed and it was fine, but I guess I should install OSD just to see what it is. Something tells me that my initial overclocks won't be stable under stress test. I know you said any program will be fine, but I'm already sure furmark stresses it more than GPUTool, and Heaven Benchmark doesn't seem to stress it at all. I'm gonna give kombustion a try later as well.

Someone said overclocking voids my warranty, how does ASUS know whether or not I've overclocked my card?
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a b U Graphics card
June 5, 2010 8:12:30 PM

OvrClkr said:
He doesn't need to edit the Bios, if he wants to use AB only he will need to edit the .cfg file located in the AB folder in order to unlock the voltage control. (edit the .cfg file to allow "UnofficialATiOverclocking from 0 to 1", save then overclock and you are done.


Hey Ovr, what would you suggest from experience for stability testing, and for how long in general. Also do you like MSI Strictly for OCing? I got my Asus 5850 to 925/1220 before i just didnt want to go anymore, then downclocked it to 875/1150
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June 5, 2010 8:12:37 PM

if you know what you are doing the card will be fine, if you over-volt it past 1.3v with scorching room temps and the card dies then yes your warranty will be voided. The card can take a beating and still work flawlessly, it all depends on how you treat it.
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June 5, 2010 8:20:34 PM

Truhls said:
Hey Ovr, what would you suggest from experience for stability testing, and for how long in general. Also do you like MSI Strictly for OCing? I got my Asus 5850 to 925/1220 before i just didnt want to go anymore, then downclocked it to 875/1150


Well TBH i use kombustor to stress it but only when I am unsure of it's stability depending on the clock. For example since I already know that the card runs fine at 1000/2500 I don't stress test it unless I go higher than that. Like I said my card can do 1060/1310 @ 1.28v but there is no point in playing with those clocks if it will run just as fast @ 1025/1275 1.24v. As long as your GPU temps are below 75/80c you are fine, I normally do not let it go past 70c just to make sure I don't hurt the lifespan of the card.

The only reason I have Afterburner installed is due to the fan curve option :

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June 5, 2010 10:43:11 PM

I just did a quick re-read of this thread and noticed one of my questions went unanswered:

Is it possible that overclocking my processor will help with stability of the system (driver reboots) at 1000MHz core clock?

Some additional notes:

I downloaded kombustor and ran some stability tests all with MSAA x8:

Without Post Processing or Xtreme Burning Mode

1. 700MHz Core, 1000Mhz Memory (stock speeds), max temp of 68C
2. 950MHz Core, 1300MHz Memory, 1.168V max temp of 78C

With Post Processing, but without Xtreme Burning Mode

1. 700MHz Core, 1000Mhz Memory (stock speeds), max temp of 72C
2. 950MHz Core, 1300MHz Memory, 1.168V max temp of 82C

With Post Processing and Xtreme Burning Mode

1. 700MHz Core, 1000Mhz Memory (stock speeds), max temp of 75C
2. 950MHz Core, 1300MHz Memory, 1.168V [FAILED TEST THREE TIMES] max temp of 84C

The test failures were all driver resets. I don't understand what Xtreme Burning Mode is doing that my GPU doesn't like, but my GPU really doesn't like it. I'm not sure I can take a screenshot of the artifacts I'm seeing, but they're squares that appear all over the torus being displayed in Xtreme Burning Mode. This is the same artifacting I was seeing in GPUTool just before the drivers would reset during its stability testing.

I want to try the Crysis benchmark, but don't have Crysis so that's a no go I guess. Currently getting the RE5 benchmark so I can try to tweak my memory speed. I'll keep everyone posted on my progress.
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June 5, 2010 11:01:15 PM

1.168v is not enough juice for a 950/1300 overclock, if you want results you need to give the GPU more juice. Also make sure you have some sort of fan-curve set or at least jack up the fan speed to keep your temps down.

Your CPU has nothing to do with the GPU so if you are 100% that the CPU is stable at the current clocks just leave it alone.
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June 6, 2010 8:32:00 AM

Yep OvrClkr is right, if you just want to use AB then you'll need to edit the .cfg file.

Slayer697 you'll need the demo of crysis if you don't have the full game to be able to run the benchmark tool.

The Crysis demo is free to download.
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June 6, 2010 8:38:22 AM

Slayer can you post some benchmarks with that 1300mhz ram in 4xaa? Try 2 minute benchmarks in furmark or something. I've been reading up on how to give the memory more voltage since normally the voltage is only tweaking core voltage (such as if you use afterburner) and I find with my memory too high I get crashes. I had 1 test pass at 1250 with great results then the next one crashed so yeah... it's more volts or less mem speed for me. But I'm curious how yours is running.
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June 6, 2010 5:31:37 PM

wolfram23 said:
Slayer can you post some benchmarks with that 1300mhz ram in 4xaa? Try 2 minute benchmarks in furmark or something. I've been reading up on how to give the memory more voltage since normally the voltage is only tweaking core voltage (such as if you use afterburner) and I find with my memory too high I get crashes. I had 1 test pass at 1250 with great results then the next one crashed so yeah... it's more volts or less mem speed for me. But I'm curious how yours is running.


What exactly are you looking for me to compare it against? I can definitely get some more benchmarks done and post more data (like min/max/avg FPS), but I need to know what I'm comparing. As it stands now, I still haven't made 950/1300 stable in Furmark and I've only just begun testing for memory stability. I may very well be over my limit for memory and not know it. If you want me to compare 4xAA against 8xAA then I can definitely run some matching benchmarks to go with the above post, and even graph it, although I may need help getting the images online.
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June 6, 2010 6:41:30 PM

Slayer697 said:
What exactly are you looking for me to compare it against? I can definitely get some more benchmarks done and post more data (like min/max/avg FPS), but I need to know what I'm comparing. As it stands now, I still haven't made 950/1300 stable in Furmark and I've only just begun testing for memory stability. I may very well be over my limit for memory and not know it. If you want me to compare 4xAA against 8xAA then I can definitely run some matching benchmarks to go with the above post, and even graph it, although I may need help getting the images online.

I'm just curious what you're scoring to compare to mine =P
I like to run 1920x1080 4xAA full screen 120000ms timed benchmark in furmark. BTW what issues are you having? I've found that too high memory has given me complete freezes or BSOD while too high core has mostly resulted in artifacting followed by either blank screen or a grey screen with lines.
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