FSB compatiblility

seldroc · 03-03-2005, 03:45 AM

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

**Cromewell** · 03-03-2005, 04:48 AM

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

SlothX311 · 03-03-2005, 03:15 PM

Quote:

Originally Posted by seldroc

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** · 03-03-2005, 03:16 PM

Quote:

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 · 03-04-2005, 03:57 AM

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** · 03-04-2005, 04:50 AM

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

seldroc · 03-04-2005, 04:54 AM

yep, barton

**tweaker** · 03-04-2005, 04:55 AM

Yes it should work. What chipset?

seldroc · 03-04-2005, 05:03 AM

you lost me there, what's a chipset?

seldroc · 03-04-2005, 05:07 AM

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

03-03-2005, 03:45 AM	#1 (permalink)
seldroc Bronze Member Join Date: Feb 2005 Posts: 32	FSB compatiblility will a processor with a 400mhz FSB run on a motherboard that only supports up to 333mhz?

03-03-2005, 04:48 AM	#2 (permalink)
Cromewell Moderator Join Date: Dec 2004 Location: Canada Age: 24 Posts: 10,103	It should (provided the BIOS supports it) but it will run at a lower clockspeed __________________ You know what the chain of command is? It's the chain I go get and beat you with 'til ya understand who's in ruttin' command here. I must plug a couple comics because they are good :D: www.ctrlaltdel-online.com www.userfriendly.org

03-04-2005, 04:50 AM	#6 (permalink)
tweaker Moderator Join Date: Feb 2005 Location: Sweden Age: 30 Posts: 2,954	What 2900+ has 400fsb? Is it a barton? __________________ Posting and you - CF edition www.tweaker.se FOLDING FOR THE GOOD OF MANKIND :F@H Team 44358

03-04-2005, 04:55 AM	#8 (permalink)
tweaker Moderator Join Date: Feb 2005 Location: Sweden Age: 30 Posts: 2,954	Yes it should work. What chipset? __________________ Posting and you - CF edition www.tweaker.se FOLDING FOR THE GOOD OF MANKIND :F@H Team 44358

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03-04-2005, 03:57 AM	#5 (permalink)
seldroc Bronze Member Join Date: Feb 2005 Posts: 32	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.

03-04-2005, 04:54 AM	#7 (permalink)
seldroc Bronze Member Join Date: Feb 2005 Posts: 32	yep, barton

03-04-2005, 05:03 AM	#9 (permalink)
seldroc Bronze Member Join Date: Feb 2005 Posts: 32	you lost me there, what's a chipset?

03-04-2005, 05:07 AM	#10 (permalink)
seldroc Bronze Member Join Date: Feb 2005 Posts: 32	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