FSB compatiblility

[seldroc]

will a processor with a 400mhz FSB run on a motherboard that only supports up to 333mhz?

 

[Cromewell]

It should (provided the BIOS supports it) but it will run at a lower clockspeed

 

[SlothX311]

will a processor with a 400mhz FSB run on a motherboard that only supports up to 333mhz?

not if the CPU that you plan one using, is built with a core that your board does not support (amd doesnt usually have this problem with core support so you should be sweet)

im guessing that this is an AMD 32-bit processor, so if you have 3200+ and you plan on sticking it in a board that only runs at 333, your board will just not step up your FSB as much as if you were to stick it in a board that supported a 400 FSB

 

[Praetor]

will a processor with a 400mhz FSB run on a motherboard that only supports up to 333mhz?

Just like Cromewell said but also do realize older AthlonXP mobos are 1:1 locked for the CPU/DRAM so your memory might be downclocked as well

 

[seldroc]

alright, i tried it and it's not working, it won't even post. i've taken everything out but the processor and still nothing, tried a different power supply too, all's it does is the fans spin for about a second and then it stops. after that i have to unplug then replug the power to get it to do it again. i know i have power to the board, the ethernet light stays on the whole time... are you sure a 400 fsb cpu works with a 300 fsb supported on the mobo? It's an AMD 2900+ with cheap chaintech mobo, both brand new.

 

[tweaker]

What 2900+ has 400fsb? Is it a barton?

 

[seldroc]

yep, barton

 

[tweaker]

Yes it should work. What chipset?

 

[seldroc]

you lost me there, what's a chipset?

 

[seldroc]

ok, it says here in the mobo manual:

Chiptset
- VIA KM266 (7VIF3)/VIA KM400 (7VIF4) + VT8235


also, i set the EXT. Clock to 166mhz... i think thats right

 

[tweaker]

Chiptset
KM266 (7VIF3) - KM400 (7VIF4)

That's two different chipsets but anyhow it should work.

 

[seldroc]

ok, so it should work, but it's not... anything you can think of with the "symtoms" it has that i could try to see if i can get it to post?

 

[tweaker]

I'm not an expert, theres plenty of people around with greater knowledge than me, so just wait and I'm sure someone else will post if they come to think of something.

 

[seldroc]

iight man, thanks for your help

 

[Cromewell]

thats a generic manual, have you been able to boot the computer up? You could find out which chipset it is in windows.

 

[Praetor]

What 2900+ has 400fsb? Is it a barton?

If im not mistekn the 2900 and 3100 (sometimes noted with the word 'pro') are OEM/questionable chips) ... questionable because often they are pre-OCd and stuff. Grab the Central Brain Identifier from http://cbid.amdclub.ru/ and post a screenshot of the Processor tab

also, I set the EXT. Clock to 166mhz... I think thats right

Now unless you've OCd it the "FSB" is 333Mhz

That's two different chipsets but anyhow it should work.

Thats cuz the manual encompases all those mobos (hehe)

 

[tweaker]

Grab the Central Brain Identifier from http://cbid.amdclub.ru/ and post a screenshot of the Processor tab

Sure you want me to do that?

 

[Praetor]

Sure you want me to do that

It wasnt directed at you; i was just adding it onto what you stated. (of course you're welcome to do so if you want )

 

[tweaker]

of course you're welcome to do so if you want

I dunno about central brain but heres what i use to browse the forum during daytime.

Soyo with 430TX chipset, this here baby kicked some serious ass back in her days.

Fast enough for ya..?

 

[seldroc]

If im not mistekn the 2900 and 3100 (sometimes noted with the word 'pro') are OEM/questionable chips) ... questionable because often they are pre-OCd and stuff. Grab the Central Brain Identifier from http://cbid.amdclub.ru/ and post a screenshot of the Processor tab

I can't get the machine to turn on, so how might i run that?

Now unless you've OCd it the "FSB" is 333Mhz

I didn't OC it, i bought it from tigerdirect and put it in the board.