i5 2500K Overclock Help!!

L15T3R

L15T3R

L15T3R

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Okay so i got my new i5 2500k, p8p67 deluxe mobo and my h60 along with 8gb corsair ram.
Tried overclocking today and i can't get it stable at all?
I hear most people can get 4.4-4.6 without even a voltage change where as im sitting on 1.325 vcore and 1.875 pll overvoltage and can't even get 4.4 stable any ideas?
I can't seem to find out whats wrong with it? or maybe i just have a really bad chip!
Please help with any settings or any change or am i doing something wrong?
 
Pump the LLC up to U.High. You shouldn't really need to touch pll overvoltage in my experience, just leave it at auto.
 
Okay my ram is running at 1.5v stock everything
And i will try a vcore of 1.35 for it and also try the LLC and put my PLL Overvoltage to auto
Thanks guys
 
another problem is that when i run intelburntest in cpu-z the voltage goes from 1.320 down to 1.312 and it just bsod on my intelburntest but it made it further than usual, maybe a bit more voltage? should i try 1.35? is there anyway i can stop the voltage falling? i am also wondering should i be using manual vcore? or an offset vcore?
Thanks L15T3R
 
L15T3R said:
another problem is that when i run intelburntest in cpu-z the voltage goes from 1.320 down to 1.312 and it just bsod on my intelburntest but it made it further than usual, maybe a bit more voltage? should i try 1.35? is there anyway i can stop the voltage falling? i am also wondering should i be using manual vcore? or an offset vcore?
Thanks L15T3R
Click to expand...

I believe LLC is supposed to compensate for Vdroop. Try setting it to a higher level.

My 2500K needs about 1.34v to hit 4.5Ghz but my temps get a bit high at this point so I've backed it down to 4.3Ghz which only needs 1.28v and runs a bit cooler.

I am currently using a manual Vcore as getting the offset just right takes a bit more faffing about. But I guess using the offset is more ideal as the volts will drop as the CPU downclocks when idle and more power is saved.
 
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ahh okay well LLC is on V.High and i have it running on 4.5GHz Stable now. Yeah i thought that offset needed a bit of work so i went with manual.
Im stable now with these temps, do they look fine?
 
Temps look fantastic.

Offset is fairly simple to set, find your VID (coretemp) find your desired vcore (1.344v) and do a little math.

A stab in the dark guessing your VID is around 1.38v under load, an offset of 0.035v should see you right, but you'd have to check your VID first.
 
be happy with your 1.34v as my 2500k 4.5ghz needs 1.38v to pass 5 run IBT I changed it back to stock as it was reaching 75C with single fan kuhler 620 :(
 
Thanks as long as the temps are good im happy enough with it then
So basically for an offset it will be the difference between your vcore, and your VID which i will find in coretemp? Will it make much of a difference with power usage?
Thanks a lot for the helps guys! L15T3R
 
yes but only if speedstep is enabled (which it should be). Offset will drop your idle voltage down to around 0.9v with a speed of 1.6ghz. Saves on power :)
 
Yeah I have speedstep enabled but due to the vcore I think I bounces back up to 4.5GHz anyway, so will the offset fix that?
Thanks L15T3R :)
 
Okay now im getting better results with the offset i figured out my VID was 1.3961v under load so i stuck in 0.055 in the offset with - and now im stable at 4.5GHz on 1.312v in CPU-Z? Drops to 1.304V under load for some reason, is that possible? just ran IBT and im getting even better temps!
Thanks soo much for you help!
 
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That is possible yes, I couldn't get stable at 1.312v manual, needed a shade over 1.320v, set my offset to 0.060 and runs a dream at 1.312v.

What temps are you getting now? Still got some headroom for a higher speed I reckon ;)

You'll find your gaming load temps can be a good 15-20c cooler than stress load too. I hit around 67-70c on stress and rarely above 48c on gaming.
 
Well they are around the same tad lower one three cores i think and on higher on the one core but i happy with it! Do you think ill need to change the offset at all to get a higher speed? :)
Ohh that's good then I thought the temps where a bit too high for just general use and normal gaming :p
 
Seems to be a thing with sandy bridge, always get some difference in core temps, core*1 usually sits a good 8c higher than the others.

You can try just jumping the multi up with the current offset, its certainly what I would do.
 
Running IBT on High isn't fully stressing the CPU, it needs to be run on Max Stress Level. Like this

46ibtmax.jpg
 
Well i put the multi up to 46 and it booted into widows and bsod before 1st run of IBT
How do i go about making it stable? increase the - offset or decrease it?
When i run it on maximum it makes no difference for me it just takes longer and stresses more of my ram? I can't find the difference :s
 
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As it stresses more ram, putting strain on the memory controller with is on the CPU.

You need to decrease the '-' offset to increase voltage. You can also change the phase and duty to extreme and try CPU Compatibility on 120%.
 
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