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Phenom ii 720

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  • AMD
  • Overclocking
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Last response: in Overclocking
October 20, 2009 8:02:50 PM

I'm not sure how to overclock it properly above 3.2ghz. I have a decent cooler, zalman cnps 9500nt with manual speed control. Overclocking to 3.2 is fine because you can d oit on stock voltages. So far i tried overclocking it to 3.5 ghz on 1.425 volts. it wasn't stable. Does anyone know how to add voltage increments that will make it stable. I could try just adding 100 mhz increments and adding a bit of voltage but at the moment can't, also fear crashing the computer too many times. Anyone know how to overclock stabally with phenom ii 720 above 3.2ghz? I have a XFX 8300 motherboard.

More about : phenom 720

October 21, 2009 4:51:28 AM

It mostly depends on your CPU and Motherboard. You just might not be that lucky, or that motherboard isn't that good.

I've had a board get to 3.4GHz at 1.4V, and another get to 3.4GHz at 1.44V. For the Phenom II x3 720 BE, 3.4GHz is going to be your best spot. If you don't mind going up to 1.525V (just make sure your temp at max doesn't go over 70C - 73C is the max operating temperature for the CPU), you can hit the 3.7GHz to 3.8GHz range.

Just keep stepping up your voltage and keep checking your temps while running Prime95.
October 26, 2009 2:16:37 AM

i got mine stable at 3.5 with a 1.344 volts i just raised the multiplyer to 17.5 i think this might be the limit cuz at 3.6 it crashes every time. my temps dont go above 30 c with a good after market. if you need anymore help or info just messege me ill try to help you
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October 26, 2009 12:24:07 PM

there's not problem now. I did a bios update and have all the overclocking features. 1.35 VOLTS!? I had mine at 1.475volts at 3.5ghz before it was stable .Your lying lol, even the reviews say that when you go above 3.2ghz you have to increase it by 0.25 volts and then after 3.3ghz, the next 100mhz increments each require 0.5volts and i have found that out with my motherboard too.
October 26, 2009 12:39:41 PM

Every card and CPU have slight differences. If you had 10 of the same type boards and 10 of the same type CPU's, a few of them would all overclock differently (by just a little).
October 26, 2009 1:21:13 PM

you need to run occt for 30 mintues at least to 1 hour. In my opinion, 30 minutes should be enough because realistically, i can't think of an application that will stress 100 per cent of all cores for 30 minutes continuously. During this time, you must be able to find out whether the overclock is stable or not. You should either get a crash in the first 2 minutes up to 4 minutes. Or later during the 30 minutes test period. But i don't see the point eventhough it is recommended to leave your computer running a test for 24 hours. Maybe actually raising your voltages you will see a cooler temperature for that clock. I found that out, comparing 3.2ghz clock on 1.35v and 1.425 volts on 3.4ghz. That's strange but i'm not lying, on load at 3.2ghz it was 57 degrees celcius. On load 3.4ghz it was 52 degrees celcius.
October 26, 2009 9:48:38 PM

Nashsafc said:
there's not problem now. I did a bios update and have all the overclocking features. 1.35 VOLTS!? I had mine at 1.475volts at 3.5ghz before it was stable .Your lying lol, even the reviews say that when you go above 3.2ghz you have to increase it by 0.25 volts and then after 3.3ghz, the next 100mhz increments each require 0.5volts and i have found that out with my motherboard too.



no i wasnt ling it was stable for 5 hours then crahsed lol
October 26, 2009 9:55:21 PM

haha. Maybe your motherboard might be quite hardwearing. That even by taking a wrong value it still works for sometime. So let me guess you've put it back up to 1.475v for 3.5ghz? For 3.6 i'm guessing 1.525v. What about your nb voltage? I left mine on 1.35. Am i meant to increase it with the cpu voltage? Keep it almost exactly the same?
October 26, 2009 11:55:26 PM

I'm running a 720 on an Asus m4a78t-e at 3.2G stable at 1.375V. The temps rarely get near 40C. I can run 3.4G at 1.45V and it will blue screen occasionally when gaming but not often.

If I set the voltage to auto I can run 3.6G stable and cpu-z shows 1.325V but my temps get up to 60C with prime 95.

It seems that 3.2G is the sweet spot for my processor, it might be the same for yours.
October 27, 2009 10:07:17 PM

i have mine currently overclocked to 3.2ghz. On 1.35 which is stock voltage. I set the voltages manually though because someone told me it makes it more stable plus when you put it on auto it goes voltage happy. Which means it can consume how much ever power it likes which means to much ie. 1.425 volts at sometimes. I actually see that at 3.4ghz when i raise the voltages the temperature gets slightly cooler for the cpu. Maybe 3.2ghz at 1.35 volts is the absolute maximum before it needs more voltage. My motherboard only allows me to raise the voltages by increments of 0.025, maybe increasing the voltages by half of this i would get a slightly cooler overclock. Though the overclock at 3.2ghz is very stable so is the clock up to 3.5ghz. I havn't tried 3.6ghz. I'm using an xfx geforce 8300 micro atx motherboard. But seems like an alright overclocker
October 29, 2009 7:14:48 PM

hmm...I had mine overclocked @ 3.6GHz + 1.4V (no other voltage increases) on a Thermalright Ultra 120.

Upgrading to water cooling, just waiting on that reservoir and radiator.
November 13, 2009 7:55:03 PM

Was that stable and checked for at least 30 minutes?So one doesn't have to increase NB voltage then?
December 4, 2009 10:11:59 AM

I've got mine 720 stable at 3.4 with +25mV (0.025V) , just by increasing multiplier x 17.
That's what I have setup on daily basis for atleast 6 months.

to reach I had to use much much more voltage tho, but it still was stable on air (but I have 6 noctua 120mm) blowing in my rig + scythe ninja.

My CPU is rather cool, I have a problem with my NB tho 50C after boot 60C standard temp 70+ when going above 3.8 Ghz (I even lost one mobo because of it). I dont think I can reach 4 Ghz on air ;( especially with two radeons 4850 in rig. Those rads are producing much more heat on my mATX board than CPU itself.

Ah IGX is not working if UR trying to reach more than 3.4 Ghz on my DFI.
December 30, 2009 10:44:06 PM

Quote:
you need to run occt for 30 mintues at least to 1 hour. In my opinion, 30 minutes should be enough because realistically, i can't think of an application that will stress 100 per cent of all cores for 30 minutes continuously.

I'm re-encoding AVCHD movies to reduce their size, and it can take 12 hours with all 3 cores at around 97%.

I had been running the CPU at only 3.2Ghz but wanted to speed up the encodings I'm doing at the moment, so upped to 3.4. I increased core voltage to 1.4v but the PC reboot after 3 or 4 hours.

I had to increase core voltage to 1.425v for stability, but the CPU gets too hot at 70C with stock fan, so decreased to 3.375Ghz and 1.4v, and it sits around 65C which I'm happy with.

Now encoding again to see how far it gets. It seems nice and stable at the moment.
a b K Overclocking
February 5, 2010 7:07:08 AM

Hey Guys, anyone else happy to update on this thread and share their OC settings for the X3 720BE?

I am currently unlocked with the 4th core and at 200x17=3.4Ghz @~ 1.392v stable up to 6 hours on prime95. It did not crash, I just stopped the test to save electricity.

Actually I was able to run it 3 hours on 3.6Ghz at 1.425v in Everest & SuperPI with SuperPi run again & again while everest is on stress but I was surprise that it crashed almost immediately when I run Prime95 instead so I think Everest is not best stability tester.

Now I want to get to 3.7Ghz prime95 stable if possible but will be happy at 3.6Ghz and will appreciate any tip. By the way, my RAM ran on 1600Mhz 7-8-7-24-40-T1 just by setting RAM multiplier (forgot the exact parameter name) to 1:4. Motherboard is MSI 790FX-GD70. Rest of the details on my system configuration...
a b K Overclocking
February 5, 2010 1:55:01 PM

While waiting for my new Heatsink\Fan I've got mine running at 3.0Ghz. @ 1.296V with the 4th core unlocked - so 3.5Ghz @ 1.35V sounds doable !

a b K Overclocking
February 5, 2010 7:15:48 PM

Give the CPU a least 1.45/1.46v at 3.6Ghz, if you still cannot find stabilty no matter what then it might be time for a new board. XFX boards are not great overclockers.
a b K Overclocking
February 9, 2010 3:05:10 AM

So far able to get to 2hours on prime. Please see screenshot... It crashed after 2 hours and I have not tinkered with it for some days now...

I saw a lot of tips about adjusting NB voltages, loosening timing but I wonder whether my Xigmatek SD-964 is holding my OC back because it can not keep my processor cooler than 60*C when on stress test. Will appreciate any advice...
a b K Overclocking
February 9, 2010 4:43:22 AM

randomkid said:
So far able to get to 2hours on prime. Please see screenshot... It crashed after 2 hours and I have not tinkered with it for some days now...
http://i48.tinypic.com/24yy8he.jpg
I saw a lot of tips about adjusting NB voltages, loosening timing but I wonder whether my Xigmatek SD-964 is holding my OC back because it can not keep my processor cooler than 60*C when on stress test. Will appreciate any advice...


Why do you have the CPU at 1.5v? At 3.6Ghz my CPU does not need more than 1.425v and yours should not need more than 1.45v

The XIGMATEK HDT-SD964 works great for dual core's, if you want low temps at high clocks as a quad your gonna need a bigger/better cooler ;) 

Example :

http://i683.photobucket.com/albums/vv199/OvrClkr/newidl...



http://i683.photobucket.com/albums/vv199/OvrClkr/load38...



Get a 212+ and you won't have to worry about your temps ;) 

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
a b K Overclocking
February 9, 2010 10:33:26 PM

Wow... I can see that you have an unlocked X2 550. You got a gem of a processor there with low voltage & cool temperature at 3.8Ghz

Yes, I am on a lookout for better Cooler. I used to have a small case so I opted for the SD-964 before but since I have upgraded to Helios 910 then I can get a bigger one and hand down the SD-964 to one of my son's PC.
a b K Overclocking
February 10, 2010 1:46:36 AM

Hehe, that is exactly what I did with my nephew.. it was time to upgrade and now he is syked that he has a new PC that can run all his games on high settings....
February 21, 2010 7:18:45 AM

I currently have my 720Be sitting at 3.4ghz at 1.425 I am still messing with it. I used to keep the cpu voltage at stock on my m4n72-e and have been running it at 3.4 since I put the computer together. After a bios update unless I manually set it to 1.425 in bios I can't get stability at 3.4 I am probably going to try to lessen the voltage JUST a little to see if its still stable, but considering its within spec...i feel its ok. I wouldn't mind trying for 3.5.....this is my first time actually starting to adjust voltages manually so why not try for another 100mhz.
a b K Overclocking
February 21, 2010 8:03:38 AM

one_with_shadows said:
I currently have my 720Be sitting at 3.4ghz at 1.425 I am still messing with it. I used to keep the cpu voltage at stock on my m4n72-e and have been running it at 3.4 since I put the computer together. After a bios update unless I manually set it to 1.425 in bios I can't get stability at 3.4 I am probably going to try to lessen the voltage JUST a little to see if its still stable, but considering its within spec...i feel its ok. I wouldn't mind trying for 3.5.....this is my first time actually starting to adjust voltages manually so why not try for another 100mhz.



1.425v is nothing, crank up the volts ;) 

I use 1.48/1.49v when my CPU is at 4.1Ghz..

As long as you do not go past 1.5v and you monitor your temps you will be fine ...
a b K Overclocking
February 21, 2010 1:02:42 PM

OvrClkr said:
1.425v is nothing, crank up the volts ;) 

I use 1.48/1.49v when my CPU is at 4.1Ghz..

As long as you do not go past 1.5v and you monitor your temps you will be fine ...


Actually 1.425 is pretty high for just 3.4 GHz. - I have mine running at 1.312V @3.4GHz. so even without cranking up the volts it can probably get higher at 1.425.
a b K Overclocking
February 21, 2010 1:29:54 PM

I have to run 1.55v to stabilize my 710 @ 3.6ghz. My daily is is 3.4ghz @ 1.425v. At 3.4ghz, my CnQ works without mucking things up, which is nice. I know my x3 isn't a BE, but I still think its relevant, heh.
a b K Overclocking
February 22, 2010 3:10:51 PM

JDFan said:
Actually 1.425 is pretty high for just 3.4 GHz. - I have mine running at 1.312V @3.4GHz. so even without cranking up the volts it can probably get higher at 1.425.


Well it really depends, most 720's need more voltage than normal to operate at higher clocks, specially when unlocked ;) , you were one of the lucky ones if your CPU does not need to be overvolted at such clock/clocks... My x4 does not need more than 1.48/1.49v to run at 4.1Ghz, but then again I have a buddy that uses 1.53v @ 4Ghz using the same CPU...