<< I got him a Radeon 32MB DDR (I have an AIW Radeon) and he has a SBLive like myself. It just generally doesn't feel as snappy as my own system. I've got a 5Mbps cable connection, he has a 1.2Mbps DSL connection with better latency. I was wondering if the RDRAM being in two sticks and having higher latency might be contributing to this. I got him a 7200rpm hard drive and I know that it is slower than my Quantum LM in seeks for sure. But I'm talking about just general Windows useage when the hard disk isn't even being accessed heavily (i.e. clicking around menus, opening up recently opened programs, etc). >>
That sounds very much like a Windows issue, and not a hardware issue.
As you said, it lagged even without much HD use, so that rules out the HD.
For the RAM latency: No one can tell the difference of a millisecond or two when clicking on a menu or something like that. That is like saying, "my drive to work was so slow today - It took an extra 10 milliseconds." Don't get me wrong, memory latency could be the bottleneck in some applications, just not for clicking around menus or opening programs.
I have a P3 600 MHz that was really sluggish for a while. I'd click on a menu and it would wait 2 seconds to do anything (sound familiar?). It was a Windows issue, and a reinstall ended that problem.