The computer I'm getting is an older, off-lease thinkcentre. doesn't have the Pentium E6600(3.06GHz) listed on Newegg's site, but a P core 2 duo 2.0 GHz. Everything I can find on Lenovo's website indicates the motherboard should have at least 1 1/2 length and 1 full length expansion slot. Guess I'll have to wait till I get the desktop to actually find out what I can do.
thanks though - looks like I should be ok. If I can find out the actual mobo specs, I'll get back here and repost.