It's a great problem to have, but I need help deciding whether to put my 6600LE or 7800GT in slot 3 of my new Quad. While I've heard extra GPU's simply act as extra out ports for your main GPU, I don't believe that's the whole story. This is because when I used a 7800GT in slot 1 and a 6600LE in slot 3 on my DC 2.0, monitors plugged into the 6600LE had much choppier HD video playback. I would merely drag the browser from one monitor to the other, and the difference was very noticeable. Night and day. So I suspect this would not be the case with a second 7800GT. However, this card requires PCIE power, and the G5 only has one cable. I have ordered a splitter, but would this perhaps put too much strain on the PSU? (These cards are so old though, I doubt they use that much power surely?) This is now a silly question, but while I know the SLI ports on the 7800GT are useless in a G5, would there be any harm in bridging them with a spare SLI cable? It looks much nicer IMO than having two open ports facing up. Would this cause any kind of harm? This is not about cost, so if there is even a slight advantage to having two 7800GT's instead of one 7800GT and a 6600LE, I will do that. Assuming it's possible at all! If you are anyway knowledgable on this very specific topic please share all you can!