Power Requirements, 8800 vs 1900XTX

I'm looking to upgrade my video card from an ATI 1900XTX to one of the GeForce 8800 models, there's just one niggling issue I haven't been able to find a satisfactory answer to: Will my PSU be able to handle going to the 8800?

I have a 600W Enermax, so theoretically I should be fine, but I also have three hard drives, two DVD drives and a rather monstrous CPU heatsink/fan. Given that I've already had two PSUs release their magic blue smoke (although the current one has been running without a hitch for nearly a year & a half), I'm hesitant about upgrading to a more power-hungry graphics card.

The problem is, I haven't been able to find a comparison of the two anywhere, which is understandable since they came out more than a year apart, no one's going to be reviewing them head-to-head. And since different sites seem to test the cards differently, since I've found power consumption reports of both cards that have varied up to 80W from one site to another, I'm wondering if there's anywhere I could find power usage tests for both cards that used the same testing criteria.

You should have no problem at all. I'm running 3 hard drives, E6300 @3.4Ghz and a 3850 512mb (was a 2900Pro) on a Thermaltake TR2 430w.