Dual Xeon (p4DCE) Help?

[MSFE]

I recently built my own Dual Xeon (SuperMicro p4dce+, 2x2.2 Xeons, 2GIGs PC800 RDRAM).

I am a newbie to building and BIOS so pardon my lingo or lack thereof;

In the BIOS, the CPU Clock Multiplier is defaulted to 8 (it goes from 8 to 23). My understanding of P4s was that you multiplied by 400, so you would actually need a multiplier of 5.5. But seeing as this starts at 8, maybe SuperMicro does things differerntly? Anyway, a little leery of popping up to 22 since I don't want to accidentally burn out two $750 CPUs.

Also, I did benchmakrs on the ram, my PC800 scored far less than the default PC800 ram in integer scores.

Any BIOS assistance appreciated!

Thanks!

[Caffinehog]

Well, p4's are double-double-data-rate. In other words, 4X the system bus. The bus is 100MHz, so a 2.2GHz would have a multiplier of 22. BUT, what the bios or dipswitch or jumpers say means nothing. P4's are multiplier-locked. You can change settings until you turn blue, but the chip will always post at the default multiplier. With intel, you MUST change the FSB to overclock.

[Caffinehog]

Additionally, dual systems do not tend to overclock well. And, 2.2GHz is approaching the design limit for these processors. Go ahead and try to overclock using the procedures listed on the main site and in the forums, but don't be too dissappointed if you can't get above (or even to) 2.4GHz.