667mhz on 533

Dell / XPS 600
February 8, 2010 at 10:21:28
Specs: Windows XP SP 2
Hey everyone. Need counsel on some RAM issues.
I saw the post relating to putting 533 Mhz onto a 667 MHz computer, but my question is the reverse. Is it possible to put 667 Mhz onto a 533 Mhz comp without major compatibility problems? The chip I'm using is an Intel Pentium 4 3 GHZ/ Nvidia nForce4 Sli X16 MCP (My neighbor gave me an unopened package of both 800 and 667 Mhz of memory due to him making a new rig and finding those wouldn't work.) Must I use 533 or can I up the ante with 667 or 800?

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#1
February 8, 2010 at 12:05:58
What's the FSB speed of your P4...800MHz? If it is, the optimal speed to run the RAM is 533MHz. You can install either DDR2-667 or DDR2-800 but if you want optimal performance, the RAM should be underclocked to 533MHz. There's also the issue of installing matched pairs to enable dual channel mode.

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#2
February 8, 2010 at 13:04:31
TY. I followed you up to issue of installing matched pairs to enable dual channel mode

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