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Q8400 @ 1.6v w/TRUE at 99C

post #1 of 37
Thread Starter 
I've got a Dual-Fan TRUE on top of an R0 stepping Q8400.

I've set the FSB to 475, vCore to 1.6v, NB voltage to 1.5v.

And at 3.8Ghz, I'm getting 99C load on my first core, the rest follow closely.

At the same time, I've got my Q6600 @ 1.6v with an identical cooling solution never going past 75C.

The only difference I can see is that I ran out of TM, so I had to use the stock Thermalright stuff that came with the cooler.
I've reapplied it once because it swayed from the center and onto the sides.. I suppose it might have happened again but I have no idea why.
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post #2 of 37
Thread Starter 
UPDATE:

I took my Q6600 and replaced the Q8400.

Now it won't go above 70C, under the same, exact settings, except for the FSB (400 from 475).

We're talking 65nm far cooler than 45nm.
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post #3 of 37
put the Q8400 back in, could have been a seating issue. if the temps are high again. then yes bad chip.

nevermind you said u reseated it.
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post #4 of 37
400 fsb vs 475? :s Wouldn't the clocks be different then? But those temps seem awefully high
    
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post #5 of 37
Thread Starter 
Quote:
Originally Posted by ikem View Post
put the Q8400 back in, could have been a seating issue. if the temps are high again. then yes bad chip.
What do you mean a seating issue? I took the HSF off, but didn't re-seat the chip entirely.

I'll do that now and report back.

Btw, I got this chip on eBay. And that's probably where it's going..
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post #6 of 37
Thread Starter 
Quote:
Originally Posted by Razi3l View Post
400 fsb vs 475? :s Wouldn't the clocks be different then? But those temps seem awefully high
475 x 8 = 3800Mhz
400 x 9 = 3600Mhz

Not a huge difference.
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post #7 of 37
Oh right. I thought multi was 7 or 7.5 on the Q8400. Probably a bad mount or chip :/
    
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post #8 of 37
1.6v @ load on any 45nm Q8400 or Q9550 Q9650 ect. Will definitely be much hotter then a Q6600 @ 1.6V they are two very different chips

also that chip would not need nowhere near 1.6v for 3.8 maybe around 1.376
post #9 of 37
Why are you even pumping 1.6V through the poor chip? Intel say that it's safe to 1.3625V and us enthusiasts don't recommend putting more than 1.45V through it.

Your Q6600 was built for higher voltages, you'll kill a 45 nm chip at those voltages.
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post #10 of 37
Thread Starter 
Quote:
Originally Posted by freakb18c1 View Post
1.6v @ load on any 45nm Q8400 or Q9550 Q9650 ect. Will definitely be much hotter then a Q6600 @ 1.6V they are two very different chips

also that chip would not need nowhere near 1.6v for 3.8 maybe around 1.376

Seriously? It will be HOTTER?

I'll re-try 1.4v on 475.

Here's my problem @ 1.6v:

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