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CPU Overclock unstable?

L15T3R

L15T3R

L15T3R

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Joined
16 Nov 2011
Posts
94
Location
Lisburn
I have an AMD Phenom x2 560 BE and im trying to overclock it to 4GHZ atm, I have got it into boot and running prime 95 with 1.5v and after about 2 hours BSOD and the computer restarts and then back on again, the temperatures never go above 35c when running prime95, can anybody help me here on how to stabilise the overclock? or should I move it down to around 3.8 with lower voltage?
Or is there something wrong?

Thanks L15T3R
 
Sounds like it is unstable, you normally need to up your core voltage until you pass a certain amount of testing. What is your max specified voltage? 35 degrees is cool, so you have plenty of headroom for temps right?
 
well the max is 1.5 for 24/7 use from what I have searched (don't quote me I can't find reliable information anywhere) if anyone can tell me different I would gladly up the voltage, just don't want to kill the chip. Yeah I was thinking the same 35 is pretty cool, so I could maybe up the voltage to around 1.53-1.55 and then test it again? from what I can see it's the voltage that's letting me down because I had it at 1.4 and it BSOD after 2 mins on prime95 so more voltage more stable basically, but without killing the chip? If 1.5 is the max ill just have to stick with 3.8GHz
Thanks L15T3R
 
I've heard people saying those Deneb CPUs can take up to 1.55v for 24 hour use, but personally I wouldn't wanna go above 1.5v (going from CPU-Z voltage and not BIOS voltage).
 
Yeah I tend not to go beyond spec unless I have adequate cooling. Though up the volts at your own risk. CPUs are pretty tough, it's only when you pump stupid voltages through them without proper cooling is when they tend to degrade, and even then most CPUs last 10 years easily under spec.
 
Yeah I agree I don't want to go above 1.5 either so I put the votage down to 1.475 and the clock to 3.8GHz and it seems to be stable not going over 30c with prime95 on so I'm pretty happy, thanks for the help guys! Would have loved to get it to 4GHz but I think 3.8 is a good OC
Thanks L15T3R
 
Yeah, 200mhz doesn't really do much in terms of performance. Your chip will last longer too at 3.8! :)
 
Depends of the revision.

C2: 1.5V
C3: 1.4V

Both C2 and C3 in normal conditions.

However I used to have my Phenom II X2 550BE running 24/7 @1.55 for over 18months befor I upgraded to the Phenom II X4 970T (zozma core - Unlocked to Phenom II X6 1705) @4ghz stable @1.56v 24/7 running also. I have seen benchmarking sessions online go up to 1.6 - 1.7 Under water however I would not run an AMD above 1.55v for 24/7, hope this helps.
 
Its the C3 revision, so would you say I am pushing it too far already with 1.475? Or could I put it to 1.55 and try and reach 4GHz? The temps aren't going above 34c and I have ran prime95 for 24hours now, do you think I have the headroom to put the voltage to 1.55 or is that way to far?
Or just be happy with 3.8GHz? What clock did you have yours at with 1.55v?
Thanks L15T3R
 
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