Well, you definitely want to avoid my experience.
The card is a very tight fit, and I somehow manage to knock a cap right off of the motherboard while installing the card!
To add insult to injury, I didn't realize I needed a pci-e power cable (and still don't know which one to order ... help anyone!??) so I don't even get to use my new card for a few days.
In particular related to the power cable, it's clear that it's a 6-pin (molex?) on the card itself. There are 2 similar (identical?) receptacles on the motherboard. I think I need a straight, 6-pin to 6-pin cable, can anyone confirm (or better, provide links?)
My old 2600XT is (apparently) working fine even w/the missing cap. I don't trust it long term, though I suspect the cap was a filtering cap for the pci bus and since I have no cards other than the video card maybe the slightly less filtered power will still work ok.
otoh, my machine could be toast by morning.
Hope this helps, the main thing is to get the power cable in advance and then be careful installing the card itself.