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Intel Core i5 6600k overclock

3K views 32 replies 9 participants last post by  mrgnex 
#1 ·
I recently bought a Intel Core i5 6600k and overclocked it to 4.6 GHz. If I lower the voltage below 1.39v set in the bios, the overclock becomes unstable (this is based on Prime95 failing on one of the cores clocked at 4.6 GHz; the other ones keep going) One thing that bothers me a bit is my temperatures. They go as high as 82C. And this just in my 4.6 GHz 1.39v bios set voltage is still failing one core with Prime95. Going to set 1.4v in bios, then going no further if PC fails Prime95 again.

 
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#5 ·
Quote:
Originally Posted by magusxcrono View Post

what should be my max vcoltage? i don't want to kill my chip. I heard it was 1.45v...
Official highest voltage is 1.5 V I think but I believe everything under 1.45 is safe.
 
#7 ·
Quote:
Originally Posted by magusxcrono View Post

Oh ok, thanks. How long do you think it'll last at 4.6 GHz 1.41v in bios?
No one really knows for sure. All anyone can do is speculate based on their experience. My guess is about 3-4 years, probably longer than you'll be using it, but maybe not.
 
#10 ·
Quote:
Originally Posted by Yuhfhrh View Post

If you're running P25 24/7, probably a few years. Doing normal things, probably a decade or more.
I'd love to borrow your crystal ball.
 
#15 ·
A Strange thing happened... when I disconnected my 250GB Western Digital Hard Drive from the computer, it won't give me a option to select Windows 7 and Vista and it just goes straight to the bios. Boot Device Priority is set, so that the Corsair 120 GB SSD is on top of the list.
 
#16 ·
Quote:
Originally Posted by magusxcrono View Post

A Strange thing happened... when I disconnected my 250GB Western Digital Hard Drive from the computer, it won't give me a option to select Windows 7 and Vista and it just goes straight to the bios. Boot Device Priority is set, so that the Corsair 120 GB SSD is on top of the list.
Sounds like windows was installed while another drive was hooked up. w7 will install the boot record on secondary drives if they're connected during installation. I hate it.

Reattach the drive and try again to confirm. It doesn't give you the w7 option because it doesn't know it's there, essentially.
 
#17 ·
Quote:
Originally Posted by ForNever View Post

Sounds like windows was installed while another drive was hooked up. w7 will install the boot record on secondary drives if they're connected during installation. I hate it.

Reattach the drive and try again to confirm. It doesn't give you the w7 option because it doesn't know it's there, essentially.
Yea. When I hooked up my hard drive again it gives me the two options to boot into Windows.

The hard drive keeps making clicking noises...it's really old.
 
#18 ·
I got the CPU up to 4.6 GHz @ 1.42v. Grand Theft Auto 5 kept crashing but I think it was due to me having AA enabled and set at 4x. Once I took that off, it didn't crash again. And I would like to know if there is a fix for the Windows not booting up and just goes straight to the Bios.
 
#19 ·
That's pretty high voltage for the frequency. I would back it off to 4.5 and see how low you can get the voltage.

You can fix the boot record error by using a flash drive with a windows installation .iso on it. Instead of installing, try repair
 
#20 ·
Quote:
Originally Posted by ForNever View Post

That's pretty high voltage for the frequency. I would back it off to 4.5 and see how low you can get the voltage.

You can fix the boot record error by using a flash drive with a windows installation .iso on it. Instead of installing, try repair
Yea, the voltage is high because it isn't stable at anything lower than 1.4v at 4.6 GHz because of that 1 core that's weaker than the others. I could reduce my frequency to 4.5 GHz with a vcore of 1.35v and be 100% stable...

Currently testing CPU @ 4.5 GHz @ 1.3v set in Bios with Prime95 v28.9build 2, which is 1v higher than the stock voltage @ 1.2v. It looks like my CPU needs a big jump in voltage (1.35v to 1.4v) to get 4.6 GHz stable in Prime95.

Prime95 just closed by itself...the CPU needs more than 1.3v to be stable at 4.5 GHz. I am guessing if i reduce my frequency to 4.4 GHz, it would be stable at this voltage.
 
#21 ·
Quote:
Originally Posted by magusxcrono View Post

Yea, the voltage is high because it isn't stable at anything lower than 1.4v at 4.6 GHz because of that 1 core that's weaker than the others. I could reduce my frequency to 4.5 GHz with a vcore of 1.35v and be 100% stable...

Currently testing CPU @ 4.5 GHz @ 1.3v set in Bios with Prime95 v28.9build 2, which is 1v higher than the stock voltage @ 1.2v. It looks like my CPU needs a big jump in voltage (1.35v to 1.4v) to get 4.6 GHz stable in Prime95.
 
#22 ·
Quote:
Originally Posted by magusxcrono View Post

My 6700k is stable at 4.7 and 1.35 volts. For 4.8 it needs 1.435 V and I am totally okay with that. I can cool it and the CPU will be sold or replaced way before it dies. So why not enjoy the extra 100 MHz and bragging rights?
 
#23 ·
Quote:
Originally Posted by mrgnex View Post

My 6700k is stable at 4.7 and 1.35 volts. For 4.8 it needs 1.435 V and I am totally okay with that. I can cool it and the CPU will be sold or replaced way before it dies. So why not enjoy the extra 100 MHz and bragging rights?
True, I just would like to know if it can last at least 3 years with over 1.4v going through it. Intels site saids 1.45v should be the max... I downloaded Mame32UI (An Arcade Emulator) and decided to get Carnevil. It crashed, but I managed to pass Intel Burn Test no problem. I set my voltage to 1.35v in the Bios and played Carnevil again, and it didn't crash again. I took the frame rate cap off to stress the CPU (Carnevil is a CPU intensive game)
 
#25 ·
Quote:
Originally Posted by magusxcrono View Post

Intel says 1.45 V that probably still means it'll hold up at least a decade instead of two.. I mean if they would provide a "max safe" voltage and their chips would explode within a year that wouldn't look too good on them.. So the choice is up to you..

By the way. Siliconlottery sells chips with a voltage of 1.456 (granted that is for 5.2 GHz..). And I think that is proof that 1.45 is even more than safe.
 
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