what memory for FSB 800 CPU and 400/533 Motherboard?

Hi!

I have a Motherboard that supports 400/533 MHz RAM, and an Intel Dual Core 2x2.4 GHz CPU with FSB of 800 MHz. What memory should I use? 400 or 533? Is there any performance loss involved when 533 RAM downclocks to 400?

Thanks!

Sincerely,

Bojan Hrnkas

Yes, it is DDR2 compatible. It is a rare HP/Compaq OEM Motherboard. Is my system gonna be faster with 533MHz DDR2 than with 400MHz DDR2, even though FSB ist 800MHz?

Im running my 800mhz fsb p4 with 1:1 timming on my ram. I achive this though pc3200 or ddr @400mhz with timmings of 2.5-3-3-8.

D'oh! Saw the ddr2...

The ddr 533 will downclock to 400 mhz, you could probally get better timings too. Is it pc6400 or ddr2 with 400mhz effecive ( I dont think that exists) the ddr2 @ 400mhz is actully running at 800mhz wiile your 533 will run at 1066mhz. You should probally try to run your cpu and ram 1:1. Im not shure how to achive that with a pentium d but with a core 2 duo it would run ddr2 400mhz/800 effective with timmings of 4-4-4-12. If your using a core 2 duo, then get pc 6400 with the timings i just mentioned.

Maybe at least 667mHz for the next build. Do you think that the memory would still work for his setup if he used 667?

Thank you guys! It pretty much solved my dilema. I think I am going for 400MHz RAM, since my next system will deffinitely gonna make use of faster RAM than 533.