AGP 4X now becomes 2X after overclocking!

[Jason]

I'm using the Matrox G400Max video card, and it was operating at AGP4X before I overclock my Intel 800E CPU to 1Ghz, 1.75V. My motherboard is Asus CUSL2-C. Can anyone suggest me how can I make my video card operate back to its 4X AGP ??
Thank you very much~
Jason.

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P3-800E@1000MHz 1.75V, Asus CUSL2-C, adaptec 29160 scsi card, Quantum Atlas 10KII, Quantum Fireball LM, Pioneer 6X scsi DVD, Pioneer 36X scsi CD-ROM, Sony CRX 140-S scsi burner, internal scsi Zip 100, adaptec 2906 scsi, Umax Astra 600S scsi scanner,........etc

[DocClock aka MadClocker]

I don't think you want agp 4x...the 4x, 2x designation is that it trancefers the agp signals at 2x or 4x the "normal" agp speed, so agp 4x is simply overloading the bus, and above the 66mhz spec the bus is overclocked, and therefore pumping or trying to pump in more data than the bus can handle.
The best analogy I can come up with is...it's kinda like trying to get ata100 out of a ata66 mobo...it just won't go there.
Even if you could get 4x at that speed, you will probably start getting errors.
Of course I could be wrong...I have been before....once

[Brust]

It's a bug (intentional, maybe) in cusl2 bios. When you overclock the fsb above a certain limit (usually 140mhz), the bios drops the agp and memory timings.
Take a time and visit www.cusl2.com forums. There's a lot about it in there, including a fix for the "missing" agp4x.

[Jason]

really?! well, my fsb is set at 125..