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2Gig 6400C4PRO + 1Gig 4300C3PRO Error


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I've just bought 2 x 1024 sticks of Corsair DDR2 Twin2X XMS2-6400C4PRO

In my machine (P4 3.2Ghz, ASUS P5GD2 Premium Motherboard) I already have 2 x

512 sticks of Corsair DDR2 Twin2X XMS2-4300C3PRO


When I put all the RAM in, I get an audible error that says, "System failure

due to CPU overclocking" and the system fails to boot.

If I remove the two 512 sticks, the system comes up with a visual error,

"Overclocking Failed! Please enter set up to reconfigure your system."

I also get the option to load default settings and continue, which I have

done and everything seems to work fine. But, obviously with only 2Gig of



The system is not overclocked in any way.

How can I get all 3Gig working?

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I think you have missed something: Your 800 Mhz capable RAM (currently installed) is being underutilized. If a Bios recognizes your memory, as yours has, and if that memory is faster than FSB of processor (533 vs. 800Mhz), then the bios simply runs the faster memory at the slower speed of your processor's FSB. The RAM Guy was 100% correct with everything he told you.


But your system still should be stable, and enjoying the nice new memory! Especially with an ASUS board (Good choice).



dalems97 :D:

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  • Corsair Employees

I cant really suggest one MB over another as it will cause a conflict of interest for me. But I would suggest looking in Dominator Qualifications and Testing! and start with the MB's we use for testing the modules.


And the Core 2 Duo is the way to go for now; there is not really any reviews on the Quad core CPU's yet but they might hold promise, just check out the most popular review site I am sure they are soon to come out with them.

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Not really, I'll just run it this way until I buy a PC in the new year. I know it's an arse-about way of doing it, but what motherboard (ASUS) and CPU (Intel) would drive that RAM to its full potential?


I have no conflicts. :) I would choose either the Gigabyte 965P-DS3, 965P-DQ6 or the ASUS P5B-E Deluxe motherboards. The Gigabytes have solid capacitors so that made my choice and they are great, stable boards.

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