If the board is an earlier S370 model from 1999 or early 2000, it's possible.

Do you have any other boards on which to test the 850mhz chip? I haven't seen many 370 boards that have a manual clock speed setting.

Your BIOS might also be culprit by not supporting the newer chip.

Are you running the latest BIOS? That's the first thing I'd try. You can get it here http://support.asus.com/Download.aspx?SLangua … &m=CUBX&p=1&s=4

In fact, on that page:

CUBX BIOS 1006
Update option ROM of CUBX onboard CMD chip.
Support 566MHz and 850MHz CPU with clock ratio equal or greater than 8.5x.

Quite honestly I will get a new CPU before I try to flash the BIOS. Every time I have ever tried that has ended in disaster (a non-working board) 😠

I don't think any number of new CPU's will help you if the board's BIOS doesn't support them in the first place.

I've flashed more BIOSes than I can count and I've never had a bricked board... how are you doing the flashing?
All you need is the BIOS file and the flash util on a bootable floppy.

What I mean was switching to one the board will definitely support, like a 750 or 800. Seems like the trouble starts going over 800. 😜

Well if you click the 'CPU Support' tab in that link I posted it tells you that officially the fastest CPU supported without upgrading to at least version 1007 BIOS is a Celeron 533.

Wow - I will have to look at that. I didn't realize how dated this board is. Since the CPUs are multiplier-locked I didn't think the board would make that much difference

Thanks for the input

[Thread moved to Marvin Section]

i have a cubx also and i put an coppermine-1.13g on, it boot well and ran on 850mhz with nothing wrong. i set it at 100mhz fsb cause bx doesn't officially support 133fsb and i don't want to bother with potential troubles.

Every time I gave ever tried to flash a BIOS is has ended in disaster - seriously.
I was thinking about ordering a replacement chip from this place:
http://www.biosman.com/replacement.htm
Has anyone every had any dealings with them? Do they look legitimate?

Curiosity is killing me... how many times have you had disasters when flashing a bios?

Before flashing, take the original BIOS chip out and insert an empty one. Then you have a backup chip in case things go wrong 😀

Whatever you do STAY OFF THAT SITE I listed. I went there from my work computer and it downloaded a Trojan - IT came and took the hard drive 🙁