How to run DDR2@1066MHz AND Quad Core 6600 clocked to 3GHz ?

[vwgolfman]

I am desperate for any help here.

Is anybody running an 1066MHz RAM and a Quad Core 6600 clocked to 3GHz or greater?

If so how do you do it?

I am having great trouble in doing both.
My IX38-Quad GT Mobo will let me up my FSB to 333 and with X9 multiplier I achieve 3GHz for my CPU.
I can also get my RAM to run at 1066MHz by using an FSB of 266 and a 1:2 divider.

BUT I cannot seem to configure the Mobo to enable both at once.
Please see my threads...
http://forums.overclockers.co.uk/showthread.php?t=17824042
http://forums.overclockers.co.uk/showthread.php?t=17819451

 

[vwgolfman]

Hi pastymuncher and thanks for your good advice.

Unfortunately I am getting quite frustrated now and almost to the point of giving up

I have followed your suggestion..........

FSB 400
Multiplier X8
Divider 1:1 (800MHz)
CPU Core 1.35V
VDIMM 2.15V

It booted into Vista but then I had a BSOD as soon as I ran Prime95.

 

[vwgolfman]

I have run the Quad at stock speed (2.4GHz) with the RAM at 1066MHz.
I did this using a 266FSB (X9) and a divider of 1:2.
The mobo is happy at stock VCore (1.3V) but I upped it to 1.325V to be sure).
I set my RAM timings to 5-5-5-15 and a VDIMM of 2.15.
These are the settings as recommended by Corsair.
My RAM is 2GB (2x1GB) Corsair TwinX DDR2 XMS2 Dominator, PC2-8500 (1066).
I had no problems with this config.

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I can also run my Quad at 3GHz. I do this with a 333FSB (X9).
I MUST keep my divider at 1:1.2 to keep the RAM to 800MHz.
As soon as I raise the RAM speed by changing the divider the machine crashes.
Even raising it to 1:1.25 (833MHz) again with a VDIMM of 2.15V gives me trouble.

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Is it OK to raise the VCore to 1.5V so long as the temps are OK or is it too high?
At which temp should I begin to worry?

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Prime95 does open 4 threads.
I thought the same as you with regards to the heatsink and the core temps.
For this reason I removed it (last evening) to ensure it had heatsink compound across the full surface. It definitely has a good bond so I don't think that's the issue.

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I have run Memtest on the RAM at 1066MHz with no problems.

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What I cannot understand is how I can either have my CPU at 3GHz or my RAM at 1066MHz but not both.

I shall continue to read up on everything, especially at the link you provided but at some stage I think I might end up in a loony bin

I am actually considering purchasing different RAM incase this is the cause of my troubles. If I were to do this which would you recommend?