BIOS checksum error, why?

[Alice in Chains]

LS,

I have a KT7 RAID with Athlon XP2400 @ 2200 MHz (7.5x100 = 22x100) running fine.

If I try to reach 2400 by setting the multiplier to 10.5x (= 24x) then at POST I got BIOS checksum error.

I have to powercycle my PC and it boots at default 2000 MHz. All BIOS settings are back to default then.

How can the BIOS data become corrupt when you overclock the proc to much? I never seen that on my older systems, which just freezed at power up.

Does this imply that I can never reach 2400 MHz with this setup?

Thanks,

Mike.

 

[- HAL9000]

The problem is that the cpu speed is too high for the cpu to read the bios (port) information correctly. If your seeing a message (checksum error) to the screen then your cpu is still able to communicate with your graphics card at your test speed. This can happen first (instead of a bios reading problem) as well and can be experienced when you bump up your FSB/AGP speed. In this case your screen will be blank and you'll think the graphics card has gone south.

A higher speed cpu will work in your setup.

Forrest

Motherboard Help By HAL web site:
http://home.comcast.net/~hal-9000/

On Tue, 7 Oct 2003 17:47:56 +0200, "Alice in Chains"
wrote:

LS,

I have a KT7 RAID with Athlon XP2400 @ 2200 MHz (7.5x100 = 22x100) running fine.

If I try to reach 2400 by setting the multiplier to 10.5x (= 24x) then at POST I got BIOS checksum error.

I have to powercycle my PC and it boots at default 2000 MHz. All BIOS settings are back to default then.

How can the BIOS data become corrupt when you overclock the proc to much? I ...