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I7 2600K Stable 4.5GHz overclock?

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May 4, 2012 12:59:14 AM

I just got a I7 2600k, Asus p8z68-v LX, Vengeance 8GB 1600mhz Ram, Running on water(h100) in a HAFx 932, i want to know what voltage i should have to overclock to a 4.5GHz setup.
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May 4, 2012 1:00:32 AM

about 1.325
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May 4, 2012 1:06:53 AM

Thanks :)  I also forgot to mention the GTX560 Ti @ 950mhz
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May 4, 2012 2:16:18 AM

I would start at 1.28v-1.3v and work your way up. Most 2600K chips need about 1.32v as stated above but not all are created equal. Just set the voltage and see if it boots. If it does run Prime 95 and see if it's stable. If it passes 8-10 hours ( overnight ) of Prime 95 it is pretty much guaranteed to be stable.

Make sure your RAM is 1.5v and keep the max temps in the low 70s C.
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May 4, 2012 2:28:36 AM

also something i want to point out. most of the voltages that people say they that they run are on the low side. like mine in my sig below. i cant stay stable at that voltage and my actual voltage is about 1.325 like i said above. so take what people say with a grain of salt.
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May 4, 2012 2:41:07 AM

Thanks for the advice guys, im going to start at 1.28 and move up a little bit each time, my ram is running at 1.5v stock.
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May 4, 2012 3:19:14 AM

report back on your progress!!
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May 4, 2012 3:31:29 AM

I got it at 1.3v running prime 95 for tonight.
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May 4, 2012 4:14:11 AM

prime isnt what gets a lot of overclocks. its gaming and flash videos that gets a lot of them.

make sure you use offset overclocking if you can. its better in the long run. that offset should be -.055
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May 4, 2012 5:24:48 AM

Varies from chip to chip. Try at 1.28v and work your way up. Mine does it around 1.295 I think. Don't remember for sure since I've had it at 4.6 for the last year
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May 7, 2012 4:34:32 PM

Sorry to bump but you could have a good chip. I was running mine for ages at 1.3v but I was able to lower this even more very easily using offset voltages (so you can keep speedstep on). Aim to start like the previous poster at 1.28v, if it works start lowering even more :) 
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May 7, 2012 9:08:18 PM

bleechy said:
Sorry to bump but you could have a good chip. I was running mine for ages at 1.3v but I was able to lower this even more very easily using offset voltages (so you can keep speedstep on). Aim to start like the previous poster at 1.28v, if it works start lowering even more :) 


you really able to get 4.6 @ 1.254v? sounds like a big stretch.
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May 8, 2012 8:05:12 AM

cbrunnem said:
you really able to get 4.6 @ 1.254v? sounds like a big stretch.


Yes it surprised me as well, but I guess I'm lucky. I used the offset voltage so there are fluctuations of upto 1.272v when the Ram is fully utilised, but pure processor benching/normal use that is it.
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May 8, 2012 5:23:50 PM

bleechy said:
Yes it surprised me as well, but I guess I'm lucky. I used the offset voltage so there are fluctuations of upto 1.272v when the Ram is fully utilised, but pure processor benching/normal use that is it.


idk if i believe that lol. thats extremely low. will it boot over 5?
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May 8, 2012 6:51:32 PM

cbrunnem said:
idk if i believe that lol. thats extremely low. will it boot over 5?


I haven't even tried going for that, I only ever went for 4.6 since I'm on air. I haven't benched for some time and it looks (unless starting voltages are dependent on boot conditions etc) that my voltage has gone up to 1.256. Maybe this is due to the chip degrading with age though.
For your enjoyment pics below during prime95 and no load.

Edit: I added a 1.256 at the end seen as the first one has a fluctuation I said about.







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May 8, 2012 10:45:27 PM

thats crazy. i dont think that ive ever seen a chip run so low.
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May 9, 2012 12:42:30 PM

Maybe I should try and go with higher clocks, but I do not want to ruin what I have. When I upgrade (in a few years) I might give it the beans for 5ghz + on air.

I really think this chip in general is one of the best ever made, it easily rivals xeon's with quality. I know I won't be going back to AMD for many years to come unless huge changes happen.
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May 9, 2012 6:30:24 PM

bleechy said:
Maybe I should try and go with higher clocks, but I do not want to ruin what I have. When I upgrade (in a few years) I might give it the beans for 5ghz + on air.

I really think this chip in general is one of the best ever made, it easily rivals xeon's with quality. I know I won't be going back to AMD for many years to come unless huge changes happen.


What's your load line calibration set to? Are you doing a thermal balance or current balance? I can hit 4.4GHz @ 1.25, 4.6GHz @ 1.310 and 4.7GHz @ 1.35 with my chip, but I don't want to go that high with my voltages, so I stay at 4.2GHz @ 1.210. All settings are stable w/ prime95 and AIDA64 for 8 hours.
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May 10, 2012 8:04:47 AM

I will check for you later but I'm at work (I have soo many systems I can't remember lol)
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May 10, 2012 7:13:46 PM

Ok to make it easier I will just upload my bios settings. I remember when using speedstep you do have to make a lot of things auto voltages as your clock speed is continually changing, without you will probably lose stability.
Do not pay attention to my offset, the board decides the starting voltages so yours will be different.
I remember when overclocking that I had a lot of problems with Vdroop (the voltages suddenly dropping and the system crashing) I fixed this by setting loadline calibration to minimal.

By bleechy at 2012-05-10

By bleechy at 2012-05-10
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