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I have an ECS P4VXASD2+ (V5.0) motherboard, which supports a 533 MHz FSB.

I want to put in a Pentium 4 3.2 GHz processor (Socket 478) with an FSB of 800 MHz.

Would this be possible? Would the FSB of the processor just be limited to 533 MHz?

Gareth
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Wesley
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2 Answers2

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There are no CPUs that run on a 800MHz FSB that are on the compatibility list for that motherboard as far as I can tell. This usually means that the computer will not POST with the unsupported chip in.

Occasionally a motherboard will boot with an unsupported CPU, but I would be very cautious as this is usually unstable. In this case, the CPU would run at 533MHz FSB, which in-turn will lower the operating frequency of the CPU. If you need a primer on how FSB speed and CPU speed are related, you can read my answer here, which describes this in detail.

Community
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MDMarra
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Many overclocker-friendly motherboards allow you to manually set the clock frequencies for your CPU. If your motherboard allows this, you should be able to underclock the CPU to a 533 MHz FSB, and either use the stock multiplier or--if you're lucky--get it to work with a slightly higher multiplier. You probably won't be able to get the full 3.2 GHz out of the CPU, however.

rob
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