under clock

rygel_xvi · 01-19-2006, 11:09 PM

I have an odd question to ask. First, I have a KM400-M2 motherboard with a 333FSB for AMD, that I got for free, untested. I don't have a 333FSB CPU to test with but I do have an athlon XP3200 with 400FSB. The question then is can I use my 400FSB CPU in the 333FSB motherboard. I ask becaue I know withe the older K6-2 series this was possible but I don't know with the newer CPU MB combos.

**greffov** · 01-20-2006, 02:57 PM

have you tried it? I guess it will work, but with a lower speed only.

rygel_xvi · 01-20-2006, 07:27 PM

I havent tried this yet because I don't know if this can damage the cpu or motherboard

krazefinn · 11-24-2006, 12:29 AM

It shouldnt damage either. If the 400 chip is unlcked, and the mobo bios allows, simply set the apprpriate mutipliers and frequency. If the bios reads the cpu as 400 bus, and plugs in the lower multiplier, it wont work if chip is locked, but shouldnt hurt anything. Many boards state they only support 333 bus, but "may" support 400 as well; the 333 was released prior to the 400's. But also many chipsets did not support 400 fsb anyway, so its a gamble. BTW 333 fsb chps are available used, and I may have a few left over. The mobo I use (a7n8X del Asus) allows me to basically set any fsb and multiplier I want. Obviosly if I clock it wrong, the bios neds to be cleared, AND wrong settings CAN overheat cpu, so be mindful of temps. I'd be happy to trade you a 333 chip for your 400 if that will help you. In case I forget this thread, email me at my yahoo ad(timo1stAT)...

A bios reflash MAY alow your mobo to run 400 fsb, but if you do, be sure to run memory in synch.

Just be sure th cpu chip is not toasted and shorted internaly, as that CAN damage the board. I've never heard of a 333 bus mobo hurting a 400 cpu' although that is no guarantee, it SHOULD be safe to test.

01-19-2006, 11:09 PM	#1 (permalink)
rygel_xvi Registered User Join Date: Jan 2006 Posts: 2	under clock I have an odd question to ask. First, I have a KM400-M2 motherboard with a 333FSB for AMD, that I got for free, untested. I don't have a 333FSB CPU to test with but I do have an athlon XP3200 with 400FSB. The question then is can I use my 400FSB CPU in the 333FSB motherboard. I ask becaue I know withe the older K6-2 series this was possible but I don't know with the newer CPU MB combos.

01-20-2006, 02:57 PM	#2 (permalink)
greffov Da House Nerd Join Date: Dec 1969 Location: One CPU Lane Posts: 3,512	have you tried it? I guess it will work, but with a lower speed only. __________________ Linux virusscanner detected a virus: Windows 95 ... delete [Y/n] y ~ ~ :wq

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01-20-2006, 07:27 PM	#3 (permalink)
rygel_xvi Registered User Join Date: Jan 2006 Posts: 2	I havent tried this yet because I don't know if this can damage the cpu or motherboard

11-24-2006, 12:29 AM	#4 (permalink)
krazefinn Registered User Join Date: Nov 2006 Location: Between birthplace of speed and wallyworld Posts: 6	It shouldnt damage either. If the 400 chip is unlcked, and the mobo bios allows, simply set the apprpriate mutipliers and frequency. If the bios reads the cpu as 400 bus, and plugs in the lower multiplier, it wont work if chip is locked, but shouldnt hurt anything. Many boards state they only support 333 bus, but "may" support 400 as well; the 333 was released prior to the 400's. But also many chipsets did not support 400 fsb anyway, so its a gamble. BTW 333 fsb chps are available used, and I may have a few left over. The mobo I use (a7n8X del Asus) allows me to basically set any fsb and multiplier I want. Obviosly if I clock it wrong, the bios neds to be cleared, AND wrong settings CAN overheat cpu, so be mindful of temps. I'd be happy to trade you a 333 chip for your 400 if that will help you. In case I forget this thread, email me at my yahoo ad(timo1stAT)... A bios reflash MAY alow your mobo to run 400 fsb, but if you do, be sure to run memory in synch. Just be sure th cpu chip is not toasted and shorted internaly, as that CAN damage the board. I've never heard of a 333 bus mobo hurting a 400 cpu' although that is no guarantee, it SHOULD be safe to test.