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Overclocking a Phenom 980

post #1 of 22
Thread Starter 
so i got my phenom 980 a few days ago. running a 2009 zalman cnps 9900 led, freshly de-ozidized in vinegar. overclocked the thing to 4.2 ghz at 1.392V and it runs rock solid stable in any game i throw at it and it never exceeds 55C, but if i run a stress test such as linx it will skyrocket to 65-70C and then fail. the PC runs 24/7 and so far i haven't had windows crash due to the clock speeds. is it okay to run it at this speed being that real world apps will never stress the cpu as much as synthetic tests would?

also wondering if it's worth bumping it up another 100mhz and increasing the voltage a bit more. i hear they can run up to about 4.3 ghz on air

the stock speed on this cpu is 3.7 GHz @ 1.26 V
post #2 of 22
yes.

edit: yes to this ? > is it okay to run it at this speed being that real world apps will never stress the cpu as much as synthetic tests would?

like you said your system is stable under normal use and your temp is acceptable.
Edited by rdr09 - 4/30/12 at 6:49pm
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post #3 of 22
Thread Starter 
thanks for answering, but yes to which? i asked two questions. thanks tongue.gif
post #4 of 22
i wouldnt for 2 reasons

1) your temps are already high
2) you wont be able to test if its really stable, and unstable cpus can corrupt your os
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post #5 of 22
Quote:
is it okay to run it at this speed being that real world apps will never stress the cpu as much as synthetic tests would?
if by okay, you mean your cpu is not within immediate danger of rapid degradation due to high temperatures, then yes. would i personally do so? no.
Quote:
also wondering if it's worth bumping it up another 100mhz and increasing the voltage a bit more. i hear they can run up to about 4.3 ghz on air
based on the assumption that you use your computer strictly for gaming; no, it is not worth it in my opinion. your chip is also not limited by the frequency but by temperature and voltage but I'm sure you already knew this.
post #6 of 22
You would get more out of your pc as a whole if you tried to lower the multipler by 0.5 or 1 and increase the BUS speed up by 5 or so.
post #7 of 22
Thread Starter 
why would that be?
post #8 of 22
the thing when running any game and running stability tests are two different things. the stability test will juice your cpu from every angle and full cpu load , if i run fsx on 960t @4.0 or 4.2 it will without an issue but when doing a p95 or linx it will BSOD or reboot , you need to up the voltage a bit till the tests are stable. 1.39 sounds good but you are above 4.0 , your temps are shooting high during linx testing it should sit around 45-47 or max 50-52 during full burn test , what are your idle temps, please check your thermal paste and reset the HSF and check fans tool.

BTW what motherboard and PSU are you using ?

try going with FSB instead of multi or mix both of them , try not touching NB or keep NB @2600 @1.3v and don't touch HT.
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post #9 of 22
Quote:
Originally Posted by passlogin View Post

why would that be?

When you overclock the FSB, all parts of the PC as also slightly overclocked, Eg. the RAM, is increased which overall makes everything slightly faster while still having almost identical CPU clock speeds.
post #10 of 22
I know that Thubans get a big performance jump from a CPU-NB overclock, but I'm not sure about Denebs.

I say, lower your OC to stock (stock is like 3.7 isn't it?), and increase CPU-NB to 2800 or so, and increase voltage to 1.25v (correct me if that's the incorrect voltage for a CPU-NB OC) and see if the system feels faster, because 3.7 on a Phenom II is already pretty fast.
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