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Phenom II x4 965 BE - even slight OC causes BSOD

Last response: in Overclocking
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August 30, 2013 9:47:00 AM

Hello everyone, and thank you for your help in advance...

I've been trying to OC the aforementioned processor for quite a while now and cannot figure out why the following happens:

The 965 BE runs at 3.4 GHz stock, which is x17. If I OC to 17.5 without playing with the voltages, I get a BSOD after a few seconds from starting prime95. If I raise the voltage to 1.425 (the maximum safe voltage as per: http://products.amd.com/en-US/DesktopCPUDetail.aspx?det...) from the default 1.325 the BIOS puts there on Auto, I can run prime95 for a few minutes on x18 before getting a BSOD. I do not have the stock cooler and temperatures usually don't go over 55 C while running prime.

My specs are:

AMD Phenom II X4 965 BE
ASUS M4A79T Deluxe Motherboard
A 700W CORSAIR PSU
1600Mhz CL9-9-9-24 4*2GB RAM

P.S. I did not install Asus EPU or other similar "tools" - I have only OCed through AMD overdrive or the BIOS. I find it really odd that I'm unable to raise the clock by 200MHz when some people supposedly run the processor on well over 4GHz all the time...

Thank you very much for helping out.

More about : phenom 965 slight bsod

a b K Overclocking
August 30, 2013 10:24:18 AM

Did you run MEMTEST overnight on your RAM to verify it is stable before trying to OC? This is rare but could have an impact if your RAM is tempreamental. If memtest fails, try dropping it down to 1333 and see if it stabilizes. Then try the OC again.

Also, the Phenom II CPUs can handle up to 1.5v as long as you have good cooling. You're starting at 3.4. It's going to take 1.45-1.475 to hit 3.8-4.0 GHz on that. If you're getting 55c @ 1.425 and 3.7GHz you're going to need better cooling to push the voltage and OC that CPU. A Cooler Master Hyper 212 EVO is a GREAT budget cooler for you. I have it on a Phenom x6 1090T @ 4.0GHz and it barely hits 52-56c during an overdrive torture test.

And I know a lot of people recommend Prime for torture testing, but I've been using Overdrive forever and prefer it.
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August 30, 2013 10:32:01 AM

maddogfargo said:
Did you run MEMTEST overnight on your RAM to verify it is stable before trying to OC? This is rare but could have an impact if your RAM is tempreamental. If memtest fails, try dropping it down to 1333 and see if it stabilizes. Then try the OC again.

Also, the Phenom II CPUs can handle up to 1.5v as long as you have good cooling. You're starting at 3.4. It's going to take 1.45-1.475 to hit 3.8-4.0 GHz on that. If you're getting 55c @ 1.425 and 3.7GHz you're going to need better cooling to push the voltage and OC that CPU. A Cooler Master Hyper 212 EVO is a GREAT budget cooler for you. I have it on a Phenom x6 1090T @ 4.0GHz and it barely hits 52-56c during an overdrive torture test.

And I know a lot of people recommend Prime for torture testing, but I've been using Overdrive forever and prefer it.


Thanks a lot for replying. Yes, I did run memtest (though not overnight) a few days ago and it did not detect any problems. I've already lowered the memory clock to 667 a while ago, just to rule out that RAM is causing trouble. I'm going to try upping the voltage and see if I can get stable, at least on 3.6GHz.

Thanks
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a b K Overclocking
August 30, 2013 2:09:43 PM

Try raising your cpu/nb voltage to 1.37-42 and leaving core voltage @ 1.4..idk ..you've ruled out RAM so..
do you have a fan blowing on the VRMs?
Set NB voltage to 1.23
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August 31, 2013 2:23:52 AM

schmuckley said:
Try raising your cpu/nb voltage to 1.37-42 and leaving core voltage @ 1.4..idk ..you've ruled out RAM so..
do you have a fan blowing on the VRMs?
Set NB voltage to 1.23


Thanks a lot, bumping up NB voltage really appears to have helped and the system is running as expected now.
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a b K Overclocking
August 31, 2013 5:01:04 AM

cool!
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!