I don't remember where I originally heard about this, but it's really cool.

http://www.viahardware.com/memoryenable.shtm

I installed it in both Win98 and Win2k and my memory throughput increased and my overall system benchmarks increased.

Before Memory Enabler:
ALU=290, FPU=346
After Memory Enabler:
ALU=324, FPU=404

Pretty slick. I'm sorry if this is a repost, but I'm trying to help.