800 or 512 FSB in 400 FSB mobo work?

[p356]

I've got an Intel D845WN, that has 400 FSB, Intel P4 1.6 Ghz ship in it. Would like a cheap upgrade, like $50 for a P4 2.5 Ghz CPU, but the ones I see out there are 512 or 800 FSB. Anyone tried this in this motherboard, and will I get 2.6 GHz?

 

[Fragrant Coit]

Check this out for compatability

http://support.intel.com/support/motherboards/desktop/d845wn/sb/cs-008944.htm

Faster FSB CPU's simply won't work.

The old 400MHz 2.6 is the fastest it can handle, according to Intel.

 

[LinkedKube]

if its possible the only think you might be able to do is change the multiplier. Which the multiplier on that is x4, hence 400fsbx4=1600mhz. Say if you were to change the multiplier to 6, it would be 400x6=2400mhz. But I dont know a whole lot about old p4s, if you can change the multiplier but you can check in the bios though.

 

[Fragrant Coit]

Correct me if I'm wrong... but I don't think it'll even POST with an 800 {or 512) MHz CPU, so it'd be difficult to change the Multi!!!!

You are probably better saving a bit of cash and getting a cheap Core2 - like an E2160, board & RAM. That'd eat the old P4 for breakfast.

You could always source a used 'board + 800FSB CPU {don't get a Celeron! get the "proper" P4}, but I'm seeing a lot of failing P4 S478 motherboards at work at the moment, so it'd be a bit of a gamble.

 

[p356]

Thanks for the advice. I think I'll keep it cheap-ish and just get exactly what Intel says to get bus-wise. Can't justify spending much (to get the next generation of good stuff) as I've used up my "spending money on myself" credits with my wife! Looked in to 2.5 P4 Pentium.