I am trying to overclock my i5 2500k to 4.6 but i everytime i use prime 95 i always get a blue screen like 1 minute of running it,im trying to find out why its doing it.I dont think it over heats because on core temp its in the 40's.
mobo:MSI z77-gd55
ram:GSkill Ripjaws 1333
psu:Corsair TX750
Mobo settings:cpu ratio-4.6
vcore-1.355
internal pll voltage disabled
intel turbo boost disabled
enhanced turbo disabled
spred spectrum disabled
EIST enabled
C1E support disabled
intel C state enabled
overspeed protection enabled
Personally, I don't think the heat output is worth an extra 100MHz. My 2500k can get to 4.6GHz, potentially higher, but it just gets really toasty.
Here are my specs/settings
MSI P67A-G45, 4x 2GB DDR3-2000 @ 1866, Dark Knight (original).
I'm at 4.5GHz @ 1.325v, with temps Δ~42c and all power saving features enabled (idles @ 1.6GHz)
When I was a 4.6GHz, I had 1.375v, temps well into the 70's, almost 80c, and had to disable C-state, along with some other things. I haven't really played around too much with C-state on.
In short, either be happy with 4.5, or crank the core voltage and/or try disabling C-state (or other powersaving features).
I just took a temp reading now, and after 10 minutes of Prime95, my two hottest cores are at 66/64, but my side panel is off with ambient temps ~24c.
Try to pull the vcore down to 1.350.... If still getting blue screen, then go down to 1.325.... I have found that with i5s and i7s 1.350 is max on the core with keeping it completely stable and not extremely hot
i moved it to 4.5ghz and it lasted for an hour before it blue screened with prime 95 load i had it at 1.350 vcore
Hi pcexplosion,
Just my 2 cents of exp.
I think that your vcore voltage seems to be too high and thus the bluescreen, had the same problem when I tried to OC as fast as I can without really getting to know the cpu more.
I would suggest you start with 1.2 vcore first at 4 GHz and slowly moving up your clock speed until you get bluescreen which would mean that the vcore is too low. Generally, the vcore voltage should not be adjusted much even with a 100 MHz increment. Basically increasing ever so slightly on the vcore and find out whats the maximum clock speed you can achieve(then minus 0.1 to stablize it) and not choosing your desired clock speed and than finding out the vcore voltage.
Eg, If, 1.2 vcore = max clk spd of 4Ghz, so at 1.2 vcore, I can assume 3.8 or 3.9 to be stable to do stress test.
1.225 vcore = max clk spd of maybe still 4 GHz(stable) or 4.1 - 4.2GHz(unstable)
Mine ran well with 1.235 vcore with 4.6 GHz(Very Stable, temp 75-85 degrees), whereas at 4.7GHz(stable, temp 75-90 degrees), any voltages above 1.235 was considered unstable. I may have damaged it when I first started out running 4.7 GHz with immediately putting vcore at 1.350. Though my highest clock speed was 5.2 GHz at 1.35 vcore temperature at 85 - 95 degrees but failed the stress test after just a few hours. Meaning extremely unstable.
PS: Im using Ivy bridge, so temp up to 95 is acceptable under stress test.
Know that not all cpu chips are identical, what may be the values of someone else OC config may not work for yours. I learnt it the hard way here.
Dont rush when doing your OC. As it may just damage the parts.
Hope I dont offend anybody here, my first day here as well as my first post of anything that may help someone.
its not stable on 4.4 or 4.5 but it hasn crashed yet on 4.3 with vcore 1.300 but on cpuz it says its only using 1.280.
you can try reducing more of your vcore. To me, it still seems to be too high of a voltage that causes these bluescreen. I tried putting 1.3 vcore and immediate bluescreen during stress test. try do it from stock voltages and slowly increasing till you blue screen, than increase your vcore voltage by 0.005 eg 1.2 to 1.205. Keep repeating these till you get the highest clock speed with the best stability.
if 4.4 Ghz stable is your max, i suggest to remain over there and not push it too much. As it may damage your chipset.