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e8400 overclockin'

post #1 of 46
Thread Starter 
So the P5K prem is back from RMA and its going to help me get 4ghz.

Right now, the only way I can get there is by 1.3875v in BIOS, and that works out to 1.368 in windows.

Now a very knowledgable fellow had advised that this voltage is pushing it for 45nm chips..just wanted some more input on this if possible, because others are telling they've been running these volts for a few months now.
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Kopisaurus
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post #2 of 46
that is above intel's max vcore (1.3625) they posably can go up to 1.4 but that is pushing it
Edited by rancor - 6/27/08 at 10:42am
post #3 of 46
Here is the official website for our CPU:

http://processorfinder.intel.com/Det...px?sSpec=SLAPL

I wouldn't recommend going above 1.3625v as some people have ruined their CPU's by doing so, while others say it hasn't done anything to them. You are right on the envelope though, so I don't know what to say about yours. Usually the people that hurt theirs were doing 1.4+ to hit above 4GHz. These CPU's do run cooler than the 65nm parts, but temps aren't the culprits that are killing them either.
post #4 of 46
Thread Starter 
Its getting to about 53c at its highest...thanks for the input guys. I was hoping to hit the 4ghz stable 24/7 mark but now I'm not so sure.

I think i'll try it here and see what happens.
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post #5 of 46
Yeah, that batch is not an exceptional clocker. It's not horrible, but it's not as good as the better examples of early E8400s that some lucky few have.

As mentioned, the offical word from Intel on what is safe 24/7 is 1.3625v, so if you go higher, you're gambling with the chip.

If your memory and chipset can handle it, you may want to lower the multiplier to 8.5 or 8 and crank the FSB. I never had trouble reaching high FSB OCs with my chip (same batch).
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post #6 of 46
Thread Starter 
OK, maybe I'll give that a go. My ram/chipset are good for 500fsb easy. Hell I could probably run 500x8 which would be sweet ...stupid voltage limits..I mean 1.3625? Come on..gimme at least 1.4 intel!
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post #7 of 46
Mine is running at 3.8 on stock voltages. Im using a 8x multiplier and 475mhz on the fsb...Ran it for over and hour with prime95. Ill prolly do an overnight prime95 run but I will probably see if I can hit 4.0...I dont think ill need much more for gaming, I just dont want to bottleneck my video cards when I run them in sli.
post #8 of 46
Quote:
Originally Posted by Blameless View Post
Yeah, that batch is not an exceptional clocker. It's not horrible, but it's not as good as the better examples of early E8400s that some lucky few have.

As mentioned, the offical word from Intel on what is safe 24/7 is 1.3625v, so if you go higher, you're gambling with the chip.

If your memory and chipset can handle it, you may want to lower the multiplier to 8.5 or 8 and crank the FSB. I never had trouble reaching high FSB OCs with my chip (same batch).
Does CPU-Z tell you what your batch number is, or do I need to see the top of the CPU to read that.
post #9 of 46
Thread Starter 
Quote:
Originally Posted by hairston630 View Post
Mine is running at 3.8 on stock voltages. Im using a 8x multiplier and 475mhz on the fsb...Ran it for over and hour with prime95. Ill prolly do an overnight prime95 run but I will probably see if I can hit 4.0...I dont think ill need much more for gaming, I just dont want to bottleneck my video cards when I run them in sli.
You must have a gem of a chip!

Quote:
Originally Posted by bioniccrackmonk View Post
Does CPU-Z tell you what your batch number is, or do I need to see the top of the CPU to read that.
You'll need to check the top of the CPU, here's my chip.

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Kopisaurus
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post #10 of 46
whats a good batch number to have?
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