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[!] CPU Speed Wrong

Problem: Took out old XP 1900, put in new XP 2600 ( 333MHZ Front Side Bus ) and motherboard recognizes it as a XP2000.

It supports up to XP 2600 , the board is Gigabyte GA7VRXP Revision 2.0. I did a BIOS update, same problem. Set clock multiplier ( which appears as little switches on my board ) to 12.5x, still nothing.

Motherboard FSB is 266, and that's all it supports. The CPU is 333, so perhaps that's the problem?

Also, in the BIOS " CPU Host Clock : 133 "

Vcore voltage : " Normal "

Please help, I've got 10 days to return it... :(Motherboard Link


Yep, definitely the cpu is the problem. If your motherboard only supports 266mhz fsb, thats all the cpu will run at. ie 133x12.5 = 1.66ghz ~= XP2000. If you have overclocking options though you can probably take it higher, to the 166mhz fsb. If not it looks like you'll have to get a 266mhz fsb cpu.
I have the 7VRXP too. FSB 333 is not supported so you will never get the full performance out of the chip. There are some older threads in here about where to find the info on trying to make the 7VRXP work at 333. I've looked at them and they all require overclocking the FSB which is possible with the board, but can cause instability at best and at worst could fry the video and PCI cards. You also have to have the 1.1 or 2.0 version MB's and use the F6 (does not support COPs) bios.

Setting the multiplier to 12.5 x 133 = 1666 which is the clock for an XP2000. You need the F10 bios or latter to recognize chips above XP2000.


I've updated to F12 with no problems. There is no guarantee the bios will fix the problem though. I thought the Barton chips were not multiplier locked, but I'm not sure if they will work with 266 FSB and higher multiplier on the 7VRXP. If you try the bios update and get the Barton speed up to 2500 please let me know.

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