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AMD II x3 445

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August 19, 2010 6:12:54 AM

CPU: Amd II x3 445 3.1ghz
mobo: Asus M4A77TD
Ram: 4x1g ddr3 1333
PSU: 500w

I'm new to overclocking and don't know how to do it, I did it once about 3 years ago but have forgotten how. Basicly I would like to get it to 3.3. This is the exact same rig as: http://www.tomshardware.com/reviews/cpu-gpu-overclock,2...
except i have 4g ram instead of 2.

They were able to get it to 3.5, and I have two fans on the cpu where they had one, and I have two other fans on the side of the case, but they are down by the gcard. So i think getting it to 3.3 should be fine. What would I have to set everything at to get it there? I know where in the bios to make these changes, but I don't know how to do the math for it anymore :( 
If someone could help me out with the numbers it would be appreciated :) 

Or give me an easy how too? i've read alot of those guides and they are either not for my proccessor, or they go into way too much detail which makes me get lost. I know where in the bios I have to do the tweaking, so just give me the step 1: adjust X variable by X amount and test to see if it is stable then rinse and repeat until its at the desired speed. That would be very appreciated.

I have coretemp running right now and it is showing a temp of about 19 idle and 32 while benchmarking FFXIV. I heard that 75 is the max temp for this particular cpu? so I'm really hoping i can get 3.3ghz without stressing it.

More about : amd 445

August 19, 2010 6:15:44 AM

beelphegor said:
CPU: Amd II x3 445 3.1ghz
mobo: Asus M4A77TD
Ram: 4x1g ddr3 1333
PSU: 500w

I'm new to overclocking and don't know how to do it, I did it once about 3 years ago but have forgotten how. Basicly I would like to get it to 3.3. This is the exact same rig as: http://www.tomshardware.com/reviews/cpu-gpu-overclock,2...
except i have 4g ram instead of 2.

They were able to get it to 3.5, and I have two fans on the cpu where they had one, and I have two other fans on the side of the case, but they are down by the gcard. So i think getting it to 3.3 should be fine. What would I have to set everything at to get it there? I know where in the bios to make these changes, but I don't know how to do the math for it anymore :( 
If someone could help me out with the numbers it would be appreciated :) 

Or give me an easy how too? i've read alot of those guides and they are either not for my proccessor, or they go into way too much detail which makes me get lost. I know where in the bios I have to do the tweaking, so just give me the step 1: adjust X variable by X amount and test to see if it is stable then rinse and repeat until its at the desired speed. That would be very appreciated.

I have coretemp running right now and it is showing a temp of about 19 idle and 32 while benchmarking FFXIV. I heard that 75 is the max temp for this particular cpu? so I'm really hoping i can get 3.3ghz without stressing it.


Forgot to add that I did try to unlock the core by hitting 4 at the boot screen, but it wouldn't boot windows after that so i had to turn it off. Not too concerned with getting that other core unlocked really.
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a b À AMD
a b K Overclocking
August 19, 2010 12:08:15 PM

Lower the memory multiplier so its running at 1066. Increase the CPU voltage to 1.4 and increase the frequency to 213 this will give you 15.5x213 = 3.3GHz. Boot to windows and run prime 95 for 2 hours if theres no errors job done, though you could try lowering the voltage and testing again. If you find and error or instability increase the CPU voltage a notch and try again if it still fails increase another notch to a maximum of 1.5V.
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Best solution

a b K Overclocking
August 19, 2010 3:01:32 PM

+1^

simon12 is dead on.

Manually set timings and voltage for your memory according to manufacturers specs!

Some numbers you were maybe looking for..

cpu freq.
200x15.5=3100 / 213x15.5=3301

NB freq.
200x10=2000 / 213x10=2130

HT link speed
200x10=2000 / 213x10=2130

dram freq.
200x6.67=1334 / 213x6.67=1420 / 213x5.33=1135 (see if it will run at 1420)

Jut me, but I would try and keep my dram frq. closer to 1333, or slightly over. If your good at 3.3 try:

cpu
251x14.5=3640

nb freq
251x10=2510 / 251x9=2259

HT
251x8=2008

dam freq
251x5.33=1337

Vcore 1.45 and adjust as simon12 suggested.

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August 19, 2010 4:01:46 PM

sweet thanks guys, thats the perfect answers. Now to try it out. Oh and while i run that test I can't be doing anything else on this computer? just curious cuz then that means i have to figure something to do for 2 hours ><
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August 19, 2010 5:23:52 PM

well i guess its not as simple as I thought... This bios is different than the last one i OC'd on. Here is a list of the options and what they are set at, I recognized some of them and changed them to what you said, but couldn't find all the things you said to change.

ATI overclock tuner: Manual
Cpu Bus Freq: 213
PCIe Freq: 100

CPU RAtio and Voltage:
CPU Ratio: Auto (is this what should be set at 15.5? because that is the max)
Cpu/NB Freq: 2130 (figured this is the nb freq so set it to 2130)
CPU Over Voltage: 1.4
VDDNB over volt: Auto
Load line calibration: Auto

Ht link speed: 2130
Ht link width: Auto
Ht over voltage: Auto

Mem timing and voltage:
Dram Frequency: 4120
Mem over volt: Auto
>Dram timing/driving config

Chipset overvolt: Auto
PCI/PCIE clk cstatus: enabled


What else should I change? I hope this helps more, and I really appreciate the help.

Edit: changed the values to the correct settings, i had written them down wrong. This is currently how it is running and CPUz is giving me random readings, keeps bouncing the clock multiplier and core speed all over the place. Coretemp is reading my low at 15 and high at 21. This seems way too low, is there a different program that may work better?
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August 19, 2010 5:46:23 PM

ok... I think i know why it fluxuates. When i am benchmarking it stays steady, so it must be cool n quiet thats doing it? Is it ok to keep that on, or what is generally recomended?
Sorry for continually posting, i'm not trying to up my post count, i'm just bored and this is what i'm doing :) 
I appreciate all the help i've recieved from this forum and do not wish to abuse it. If constantly posting like this is wrong please delete my threads. sorry :( 

set the cpu ratio at 15.5, and now i've double checked the numbers you gave me and i think i got em all in place.... i think... time to stress test :) 
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August 19, 2010 6:57:04 PM

test came out clear. I've never used it before so i just did the default blend test. All the self tests said they succeded so i'm guessing that means i'm good? not sure what i'm looking for in those results, just see a bunch of tests being ran and once in awhile it says it was successful. No errors or failures listed so i hope i'm good.
coretemp is telling me the max temp was 37, so i really want to push this thing higher.

So I will go with the suggestion from green300:
cpu
251x14.5=3640

nb freq
251x10=2510 / 251x9=2259

HT
251x8=2008

dam freq
251x5.33=1337

Vcore 1.45 and adjust as simon12 suggested.


I am new to this "best answer" system. What does it do? does it give the person some sorta xtra points for their forum rank? What is the proper ettiquite in this situation, since you both gave me the same answer?
simon12 was first, but green300 was more detailed.
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a b K Overclocking
August 19, 2010 10:51:50 PM

Have you tried HW Monitor for temp readings ? It always reported the same as pc probe did on my board. What bios are you using ? (mainboard tab on cpu-z)

C'n'Q off til your done stressing and benching, back on when your settled in if you want.

I would pick simon12, simon12 is always here with dead on help for folks. Only reason I spoke up is because I have the M4A77TD myself with a 435.

Have fun !
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August 19, 2010 11:41:51 PM

HW monitor is alot better than coretemp, thanks :) 

bios is the one that shipped with it, um.. cpuz says it is :
American Megatrends
2007
04/14/2010

Does that make a difference?

I have it at those settings you gave for making it a 3.6 (you didn't give a ht link speed this time so i left it at 2510), running prime95 as we speak, and temps seem to be staying under 40 so far, ganna guess they get into the 40s.
Whenever people are talking about OverClocking and they say a temp, its pretty much always going to be in celcius correct?

well you are under ranked compared to him right? and you have stuck around to give me the answers i needed, so i'm ganna pick you for best answer :) 
thanks alot :) 
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August 19, 2010 11:42:08 PM

Best answer selected by beelphegor.
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a b K Overclocking
August 20, 2010 2:23:11 AM

Only reason I ask what bios is my board was shipped with one of the earliest bios 0305 and wouldn't unlock. I updated to 0313 and I was lucky enough to unlock stable. 2007 is one of the latest so you know you are currant. In fact, 2007 will support the x6's even the 95w 1055, just so you know for future reference ;) 

Definitely drop your Ht back down to as close to stock as you can, around 2000. Between 1800 to 2200 is said to be the best.

And yes, temps are most often in Celsius.

Thanks beelphegor, hope you have fun with it ! I dig my board and the 435.... This is the best death run I can get with my rig...

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March 5, 2011 2:15:55 PM

green300 said:
+1^

cpu
251x14.5=3640

nb freq
251x10=2510 / 251x9=2259

HT
251x8=2008

dam freq
251x5.33=1337

Vcore 1.45 and adjust as simon12 suggested.



Sorry for waking an old thread, but I have a 445 and got it to these numbers as well. So partially, just wanted to report the success for anyone else with the 445 wondering if they should try, and say good work on overclocking a CPU without one of them in front of you...

But I had some questions. Why the x9 NB frequency multiplier? I actually went with x8 without re-reading these numbers after writing them down, because I had read somewhere else that the two constraints are that HT frequency < NB frequency, but that they should be closer rather than further, and so I just set them both to x8 to be equal. I mean, I would guess that faster is better... but setting the HT multiplier and NB multipliers to x8 and x9 is to make them slower for stability, so, why not both x9 and x9, if it's only for another speed boost?

Anyways. My results: I have it at 251 as well, but a x8 multiplier for the NB, and a 14 multiplier on the CPU. 14.5 didn't work without raising the voltage, but, now it's at 14 without raising it at all. A boost of .4GHz without a voltage change is good enough for me. I also left the memory timings on auto, and the CAS timings on the RAM were automatically brought down to 8-8-8 instead of 9-9-9. Also, this isn't with the stock cooler... the fan was too loud at high speeds for me.
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a b K Overclocking
March 6, 2011 1:13:44 AM

You want your nb freq. as high as possible and still remain stable, you will see gains in performance. HT freq. over 2200 with a single gpu as been shown to not gain any performance only adding to possible instability. HT freq. should be ran between 1800 and 2200 with a single gpu.

cl8 is great if is stable, amd likes tighter timings over higher freq.
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March 6, 2011 4:40:11 PM

green300 said:
You want your nb freq. as high as possible and still remain stable, you will see gains in performance. HT freq. over 2200 with a single gpu as been shown to not gain any performance only adding to possible instability. HT freq. should be ran between 1800 and 2200 with a single gpu.[\quotemsg]

'Kay, thanks. That makes sense.

1901616,14,559212 said:
cl8 is great if is stable, amd likes tighter timings over higher freq.
said:


Yup, it was stable. IS stable, just, I tried something else in between.

After trying that setup two nights ago, I thought I'd try and bump up the RAM tonight. The next auto-CAS's I found by dropping the RAM another multiplier, were 6-6-6. But the bus speed on my motherboard doesn't seem to want to go above 260 (without raising voltages) regardless of multipliers. I found this equation on Wikipedia, for the actual response time of the RAM:
(CAS / Frequency (MHz)) × 1000 = X ns
where frequency is the single-channel speed of the RAM (FSB * multiplier / 2).
So a few possible setups are:
5.33 * 251 = 1337MHz, and (8 / (1337 / 2)) * 1000 = 11.95 --- This is the above solution.
4 * 295 = 1184, looking for 6-6-6 --- That bus speed just wasn't going to happen, without more Volts.
So I thought:
5.33 * 222 = 1184, and I would set manually to the 7-7-7 SPD I get in CPUz, only with the next higher speed than that SPD bunch. Which would be (7 / (1184/2)) * 1000 = 11.83... So marginally better.

So, I have two comparison settings:
CPU: 14 * 251 = 3514
NB: 9 * 251 = 2259
HT: 8 * 251 = 2008
RAM: 5.33 * 251 = 1337, auto-set to 8-8-8.
vs.
CPU: 15.5 * 223 = 3456.7
NB: 10 * 223 = 2230
HT: 9 * 223 = 2007
RAM: 5.33 * 223 = 1184, manually set to 7-7-7.
Both were stable enough to run P95 for 15 mins (not conclusive, but, I took it as good enough to know the rest would be tweaking, that I haven't done something completely wrong, or that the most recent push is completely impossible...). The second got a slightly lower 3DMark Vantage CPU score, but a slightly higher overall score. So I tried to bump it to 226 to get the same CPU frequency (and 228 was too high, without more volts). Beat both of those above, on 3DMark, but, failed P95 after an hour and a half, so, not entirely stable. Basically, a toss up, for minor performance gains in RAM, but a little less stable... I could loosen the timings a little, raise the voltage, etc, I guess, but mostly I just wanted to see if I could do it. Not perfectly stable isn't worth it to me, so, I'll probably go back to what was originally posted here.

... Unless I can get this version working... :-)
4 * 259 = 1036 and (6 / (1036 /2)) * 1000 = 11.58. 259 could be pushing it, from what I've seen so far.

But anyways. This has turned into... blogging. Quite the hijack. I might report a huge success, but otherwise, thanks a bunch for helping out a first timer!
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a b K Overclocking
March 6, 2011 6:02:07 PM

Have no idea what hardware you are working with, but a base rule of thumb here is to get your memory set to specs to start off with ! be it ? 9-9-9-24-2T 1.5v, bump the voltage to 1.53 to 1.55ish, use 2T as it is more stable than 1T. You can run IBT or Linx for a quicker idea of stability, but prime "blend" will need to run for 12-24hrs. to thoroughly test thee IMC. Then if your stable you can work on tightening timings down if you like, that is the last thing to work out after you have a base.

Stick with 251 as you have your memory running at rated it's speed and you have cpu multipliers yet to use.

You will need to increase vcore if you want to push for higher overclocks. AMD says max on air is 1.55..I personally wouldn't recommend a 24/7 over 1.5v and that is ONLY if temps are good !

memory to specs and then press on..

You didn't mention if your proc unlocked or not ?? no matter if not, I know that puppy will do 4.0+ ;) 

g/l
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March 7, 2011 1:14:45 AM

green300 said:
Have no idea what hardware you are working with[\quotemsg]

CPU: Athlon II X3 445 (as we already knew)
Mobo: Gigabyte 880GMA-UD2H
RAM: Corsair 2X2GB DDR3-1333 CL9 (CMV4GX3M2A1333C9, in case you wanted more specifics)
The case is an Antec Fusion Remote (2x120mm fans), the PSU is a CoolerMaster 500W, and the cooler is a Scythe Big Shuriken.

None of it's anything fancy (the case was a free hand-me-down), but, isn't that the point? :-P

1901758,16,559212 said:
a base rule of thumb here is to get your memory set to specs to start off with ! be it ? 9-9-9-24-2T 1.5v, bump the voltage to 1.53 to 1.55ish, use 2T as it is more stable than 1T. You can run IBT or Linx for a quicker idea of stability, but prime "blend" will need to run for 12-24hrs. to thoroughly test thee IMC. Then if your stable you can work on tightening timings down if you like, that is the last thing to work out after you have a base.
[\quotemsg]

The only reason I had the tighter timings was because I had the motherboard setting them automatically, and it drops them when I change multiplier. If I set them manually to the 9-9-9 of the 6x multiplier instead of the 8-8-8 of the 5.33, I could stretch the FSB to 258. Strangely, though, it could stay at 258 after putting the timings back to auto... The 258 was necessary with the 15.5 multiplier to get 3.999GHz for the processor. Which took 1.6V to get Windows to start, but couldn't log in without a BSOD.

So, my next question, even though I said I'd stop with the hijacking...

A) Which voltages should I increase to try and push the FSB? 258, 259 caused instability, even with the RAM only slightly above spec, and all the multipliers turned down. Until I drop the RAM multiplier to 4, and I could get 300 for the FSB--but not the 333 to get the stock ram speeds. So I feel like there should be something to push just the FSB... Plus, 251 * 15.5 = only 3800, and 258 * 15.5 = that agonizingly close 3999...
B) If I were to try again to push it to 3.999/4+GHz, is there anything else I should up for stability, other than the VCore? I can't seem to find anything that actually explains what the other voltages in my BIOS are, just things saying either to increase them, or sometimes, to not increase them.

Here's the list in my BIOS (no clue if they're standard, but, have seen the names around):
CPU PLL
DRAM
DDR VTT
NB
NB/PCIe/PLL
CPU NB VID
and CPU.
The second and last one are clear. NB/PCIe/PLL sounds like a bad thing to increase if I'm not changing the PCIe speeds. Would upping NB help with the FSB speeds? Would seem strange, given that there are the NB speeds and the FSB speeds. And considering it's AMD and it's not really a "FSB" as such, I would also believe the CPU PLL might help. But, even if a bunch of advice out there says to have fun and guess, I'd rather ask, while someone seems to be listening...

1901758,16,559212 said:
You didn't mention if your proc unlocked or not ?? no matter if not, I know that puppy will do 4.0+ ;) 
said:
said:


And nope, didn't unlock. :-/ ... At least, not with stock voltages, and, not when I tried upping the voltages when I knew even less than I know now.

Any voltage questions really are just for fun, though. Running P95 with just a few extra volts brought the temperatures up about 10 more degrees C than at stock voltages, and clearly no more significant gains in speed than the regular 3.1-3.6GHz I've been getting. I think in the end, I'll probably settle on stock V's, 251-258 FSB to get the ram to stock speeds or a little above, the automatically tighter latencies seem to work fine, and then just go as far as the multipliers can take me stably.

Thanks very much for all the help!
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a b À AMD
a b K Overclocking
March 9, 2011 7:07:25 PM

250MHz clock is the sweet spot with DDR3 1333 because if you drop the memory ratio from 667 to 533 you will return your RAMs to spec 1333MHz (5.33 x 250MHz)

250MHz clock also sets the IMC/NB at 2500MHz (with the stock NB multiplier at 10x) - should not take more than 1.2v, (if that). With the IMC/NB at 2500MHz you should increase memory bandwidth around 10-12% and reduce latency by the same amount (if that is of interest to you)

And there is no good reason to take your HT beyond 2000MHz or so -- the HT is simply a 'pipe' and a speed increase does nothing, really, to increase the bandwidth of that pipe. HT3 bandwidth at stock is 20GB+ single direction (x2 bi-direction) and with the IMC/NB at 2500MHz at best you will be cranking 12-13 GB/s with your RAMs.
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May 3, 2011 9:36:48 AM

I'm playing with the same chip. I haven't messed with memory much yet. I still have the timings set on auto and I put the memory limit on 1:2 (ddr 800). I initially had it set to ddr 1066 which gave me a memory speed of 682mhz but I was getting errors in p95. I have been running p95 for about an hour now without a hiccup so I believe thus far memory speed has been the only ceiling I have hit. I raised the fsb to 256 and the cpu voltage to 1.42. I also increased the NB voltage by .1v though I dont recall right away what that amounts too. This is where I am at so far.....



I have not hit the point where I need to take the voltage up to 1.5v yet. In that screen cap I have p95 running in the background so those temps are at full load and stable. Hasn't budged from 47c in a while. All of this is done on aftermarket air cooling. Not shabby air cooling but it isn't high dollar stuff either. Can this chip OC well? Absolutely!
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May 3, 2011 2:41:26 PM

That's amazing! Back when I wasn't worrying about long-term stability, and was trying to see how far I could push it, I could never get it to boot fully past 3.8. Guess I should have tried dropping the RAM speed? (I was also more afraid of touching the voltage back then--maybe mine just needs more juice than yours?)

I did eventually settle on 251Mhz like I said I would, but bumped the voltage up to about 1.5 to get 3.5GHz to be stable for over twelve hours. (The proc's in my only machine, and I seed from it, so I wanted it to not die on me basically ever.)

Now that the school semester's over... maybe it's time for another round? :-) I could live with a little slower RAM. The 1333 is awesome, but... 3.9GHz? :-DDD
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May 3, 2011 11:02:54 PM



At 4ghz now. still with the same settings. I tried to up the fsb to 260 but prime died after 10 minutes. With the current settings I ran prime 95 for 4 hours without a hitch. Keep in mind I still have headroom with the voltage as I am still at 1.4.
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