Overclocking help with 2600K

I have a 2600K and a gigabyte Z68 motherboard, and no matter what i do i cant get it to boot at 4.8ghz (bluescreen). I have it booted and stable at 4.69ghz (102x46) atm, and am curious about temperatures.

I have a hyper212+ and intelburntest puts my temps in the upper 80s-low 90s, handbrake encoding HD h.264 puts them in the mid 70s, am i ok or do i need to back off my clocks?

4.4ghz intelburntest puts temps in the low - mid 80s, everything else in low 70s. Is something wrong with my hyper212+ installation, or is this normal ranges for the cpu at these particular clocks?

Idle around 33 - 38c regardless of clock settings (yay for sandybridge being able to use EIST and Cstates etc when overclocked, unless thats whats holding back my overclocking?)

What voltage are you using for those clocks? You're probably better off not messing with overclocking the BCLK - just leave it at 100 and use straight multiplier overclocking. The gains from upping the BCLK aren't worth it.

As for temps - I'd say high 80s is getting a little toasty - I'd try to keep it high 70s to low 80s if possible.

1.4vcore 1.9pll 1.1VCC are my voltages, should i back off and run at 4.4? 4.4 with 1.385v and no other voltage increases is stable, temps still hit the low 80s in intelburntest at 4.4. Is there a problem with my hyper212+ installation? or are these temps common?


How did you hit 4.8ghz stable? any advice on that? i BSOD at 4.8 regardless of voltage.

Also for cooling would i be better off slapping my old coolermaster V8 on there? things easily 3x the weight of the 212+, not sure if its better though.

thats pretty high voltage for 4.4. I'm running 4.5 @1.300v. I don't know how it goes on a gigabyte board though however your temps seem normal, albeit a little high on max load.

i was able to lower vcore to 1.32v and still stable, however my vcore goes up to 1.3911 when i burn it with intelburntest, is there a way to stop it? and do i need to stop it? it sits at around 1.34 - 1.35v when i encode h.264 video, and stays at 1.32 when i game. Anyone know why it keeps giving it more voltage than i specify?

intel burntest uses linpack. linpack is presently one of the most stressful benchmarks, nearly guaranteeing 100% load on all avail processing units. It looks to me like your seeing the effects of LLC

by chance, are you overvoltaging by an offset voltage? you should really set a fixed voltage for it to run at all the time. voltage overshoot is more dangerous with LLC then constant higher voltage

maximum clock i could get on my cpu was 5 ghz at 1.425~1.45v but it overloads my UPS when i load my gpu so i had to back down

I AM SETTING a fixed voltage, and its STILL going higher, even with LLC disabled.

I got 4.8ghz at 1.41V stable but I have a feeling I can drop the voltage lower and plan on trying this after my next bios update. I idle at 33C and load at 77C. What other settigs are you running? You aren't listing all the settings you should be modifying to hit 4.8ghz+

VRM Frequency change to 350? Not sure if the Gigabyte Z68 has this setting or not.

This thread should help you...

http://hardforum.com/showthread.php?t=1578110