|Originally posted by mrdeep
You aren't just adding a new video card,
you're also adding whatever the mobo adds: new processor slot? (p5 and beyond anyone?) serial ata? raid? better sound? usb 2.0? (unless it doesn' thave it, in which case you could eventually add usb 3.0 or someting), onboard wireless? (sounds funny, but you never know), more ram support? anything that you could possibly want to throw on a motherbard ...