Intel OR840

[BiJiCool]

Hi all,


I have a Intel Outrigger (OR840) with a dual PIII 667. As PIII are running towards their end, I was thinking of performing an upgrade

I was thinking about an dual PIII 1 Ghz. However, on the Intel website I found that the revision of my mobo doesn't support 1Ghz CPU's, 866Mhz is the max.

But... Intel also says that PC1066 is not compatible with their 850E chipset, but it does work perfectly.

So I was wondering, will my dual 1Ghz setup work? And if not, can I bust my mobo and/or CPU's by trying them?

Greetz!

 

[Odeen]

To the best of my knowledge, there are three ways for a CPU to be incompatible with a motherboard:
1) Multipler too high (i.e. - earlier BX boards supported 8x multiplier tops, making P3-850's not detect correctly). This is usually a non-problem as a CPU with a locked multiplier (like every retail chip is) will force it on the motherboard. You may get funky displays at bootup, but that's it.

2) Voltage/pin incompatibility (Tualatin vs. Coppermine). Harder to overcome, as Tualatin chips need bona-fide adapters to work on older boards. This shouldn't be a problem in your case, as 1ghz Coppermine chips are from the same "family" as your 667's, just with a higher multiplier.

3) Current requirements. All things being equal, a 1ghz chip will consume more power than a 667mhz chip. That's why later revisions of a board can sometimes be certified for a higher CPU grade - the power supply on the board is upgraded to allow for more current. Since your OR840 supports older Katmai chips, you shouldn't run into current shortages.

So, I doubt you'll have any problems, and I doubt even more that you'll kill something trying this.. go for it.

 

[Peter]

1) is indeed moot, since all Intel CPUs are multiplier locked They ignore the setting that comes from the mainboard anyway, so it doesn't matter whether or not you can set the "right" one there. BIOS might display a wrong speed, but it'll still run at its intended (and locked) speed.

regards, Peter