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i7 2600k OC @ 4.5ghz

post #1 of 10
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So until I learn more about OC'ing I wanted to do a moderate increase without risking too much, so I set my Vcore to 1.35 and the multiplier to 45 and I ran IBT a couple times. This is the result:





My question is: Is there anything else I should do to determine stability? I heard running prime95 might be a good idea. I saw that my temps never went above 59C which is respectable IIRC. I'm not looking to push the boundaries of what is possible atm, but I do want to see some moderate OC benefits.

What else should I do? Or am I set til I want to go higher?

Oh my CPU Cooler is a Venomous X RT(Sig Rig) with the single standard fan equipped.
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post #2 of 10
Run prime 95 for about 10 hours. Its the best stability test for this chip. Or you can do what I did with my 2600K and let it fold for a few days
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post #3 of 10
yes run prime 95 in blend for about 12 hours. Blend will crash unstable overclocks better than ibt with sandy bridge. Not sure why this is, but it works. Ive seen overclocks that were perfectly ibt stable, but would bsod after just an hour of p95 blend.
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post #4 of 10
Quote:
Originally Posted by robbo2 View Post
Run prime 95 for about 10 hours. Its the best stability test for this chip. Or you can do what I did with my 2600K and let it fold for a few days
Folding is not a good stability test. F@H wont stress the cpu as hard as p95 does. Not too mention if your overclock is unstable your f@h client is probably sending bad data for each work unit back to the server. Just not a great idea to use f@h for stress testing. No offense.
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post #5 of 10
If you are stable at the current settings you can do one of two things:

1. Try to lower the vcore until you get the bare minimum required to stay stable.

2. Push higher until you find the max safe (temp wise) and stable clocks for your current vcore.
post #6 of 10
I am pretty sure you should redo the IBT. You have threads set to 'auto' and I am pretty sure that you have to select 8 threads manually. I have found the need for this on more than one computer that had HT... hence it showing your CPU usage at around 50% or so. Go in there and make sure you see 100% on every core. They are right as well as it's good to perform a good blend run for your final test. I have also read online that you always need to select the number of threads manually or it will only choose how many logical cores there are. You should be fine with 1.35 volts with 4.5 though. Heck if everything shows to be pretty stable try 4.6. My 2500k seems to be fine doing 4.6 with under 1.35, but obviously I don't have hyperthreading on it.... which is just fine. I bought a second i7 950 for 200 and ended up bring it back to trade for a i5 2500k and got 20 bucks back. Great deal Best of luck with your clocks my good sir!
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post #7 of 10
Quote:
Originally Posted by AliceInChains View Post
Folding is not a good stability test. F@H wont stress the cpu as hard as p95 does. Not too mention if your overclock is unstable your f@h client is probably sending bad data for each work unit back to the server. Just not a great idea to use f@h for stress testing. No offense.
It is very stressful when folding big adv and the client will crash after 3 errors
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post #8 of 10
BTW nice choice of mainboard! I just got the same one and loving it.
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post #9 of 10
run intel burn test using very high (4 GB ram) setting and do 20 runs. if u can pass that, you're stable. don't do prime it takes forever. IBT finds faults within minutes.
btw ibt has periods where it stress test, which uses 100% CPU, and periods where it checks the output, which use 25-50%. it doesn't stay at 100% all the time.

my cpu boots windows at 1.31 volt, but wouldn't be stable in ibt until i bump it to 1.34
Edited by james8 - 6/1/11 at 11:10pm
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post #10 of 10
Quote:
Originally Posted by james8 View Post
run intel burn test using very high (4 GB ram) setting and do 20 runs. if u can pass that, you're stable. don't do prime it takes forever. IBT finds faults within minutes.
btw ibt has periods where it stress test, which uses 100% CPU, and periods where it checks the output, which use 25-50%. it doesn't stay at 100% all the time.

my cpu boots windows at 1.31 volt, but wouldn't be stable in ibt until i bump it to 1.34
Yeah, but if it's set on auto it will not account for the extra threads. I have seen this on a few different computers and read it on here in a thread before as well.
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