AGP 2x Not 8X In Windows98SE

My driver is reporting that my 6800GT is running in AGP 2X mode even though its set to 8X in the bios, in XP it works perfect at 8X and is very fast, is there any known fix for this issue?

Motherboard is an SiS755 chipset with Athlon 64 3700+ (Socket 754)

There is no AGP drive strength setting in the bios.

Thanks.