Oh wow, sweet deal! I just found out that PC800 RAM, which is RDRAM, is better than I thought. It's even significantly better than PC2700 RAM in some ways, and of the RAMs compared, PC800 RDRAM has the highest peak bandwidth (3,200 MB/s). Check this out:
http://www.tomshardware.com/motherbo...sis645-03.html
Just scroll down to the chart with a comparison of different RAM types.
And Seven7, I'm very sure that my motherboard will support Nvidia's GF 4 Ti 4000 line. I don't see why it wouldn't. I got the computer back in July of 2002, I'm sure it supports cards such as those.