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All of a sudden is my E8400 chip is unstable? - Page 2

post #11 of 19
I would test RAM and such, just to be sure, but I bet it is the vcore you were running. Cooling insn't a factor with these, the vcore will kill them if higher than 1.36ish.
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post #12 of 19
Quote:
Originally Posted by kalch View Post
yikes, nothing more even if on water?
Not even if on water, as heat is not the main problem. The capacity to carry electricity is vastly reduced with a 45nm transistor vs. a 65nm one.

Keeping it only a bit above ambient as the highest end air coolers, or decent water could extend the life by two to four times compared to stock, but two to four times a few weeks is not much.

Every 10C or so lower you go is supposed to cut the progression speed of electromigration by roughly half, but it's going to take a lot of halfs to make 24/7 at 1.4v+ viable for a 45nm chip.
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post #13 of 19
Ouch, another one bites the voltage. Man, if I could even find one of these close to the list price, id be thrilled.

I think 45nm's are actually kind of cool in that it makes Overclocking even more of a black art. Heat is something clearly definable and tangible. Voltage, the new limiting factor, is something unseen and not completely defined.
    
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post #14 of 19
Quote:
Originally Posted by duffsr View Post
Ouch, another one bites the voltage. Man, if I could even find one of these close to the list price, id be thrilled.

I think 45nm's are actually kind of cool in that it makes Overclocking even more of a black art. Heat is something clearly definable and tangible. Voltage, the new limiting factor, is something unseen and not completely defined.
I refuse to get one as it would make my water set-up moot.
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post #15 of 19
What is your PCIE Frequency set at now?
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post #16 of 19
Hmm...I'm not so sure it's straight Vcore that is killing these chips.

VPLL is supposedly a strong factor as well.

We'll see. My QX9650 is at 1.4v for 24/7 on water with the VPLL at 1.6 (lowest possible and this is still within the limit for these chips)

So let's see what happens with it.
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post #17 of 19
My E8400 is completely stable at 1.30-1.31 running at 3.6 ghz. Just had to bump the FSB to 1600. I use 1.35 for 3.8 ghz..........can't get the system stable for whatever reason when I try to hit 4.0. Still have several things to try. I was going off these voltages posted on another board by a guy that has things up and running with my same motherboard:



3.6 @ 1600 FSB 1.35vc
3.8 @ 1700 FSB 1.35vc
4.02 @ 1800 FSB 1.35vc
4.2 @ 4202 FSB 1.45vc
4.4 @ 4400 FSB 1.45vc
    
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post #18 of 19
roadrashed is that supposed to be 4.2 @ 2202 FSB?
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post #19 of 19
Quote:
Originally Posted by mlb07uk View Post
roadrashed is that supposed to be 4.2 @ 2202 FSB?


I just copied and pasted from the 3rd post in this thread: http://www.evga.com/forums/tm.asp?m=...55501;�

I can't get mine to work above 1700FSB....so anything above that is uncharted territory for me.
    
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