I was planning on purchasing a GTX 280 but my psu doesn't have the 8-pin power connector. I found an adapter that converts one of your 6-pin connectors to an 8-pin. I have the required watts and ampherage on combined 12V rails. I heard of rumors that it is possible that you could burn out your power supply if you use an adapter. I'm just a wary buyer who doesn't want to fork out over $400+ on a gpu and later to find out that I have to replace a burnt out power supply. Can someone confirm this; the adapter is from this website link:
On a side note:
I plan to use the GTX 280 with a 600W power supply with combined 12V rails rating of 40A supplemented with a 350W power booster that is dedicated to my cpu. I just purchased the psu about 5 months ago and hoped to keep it for another 6 months or so in order to save up to sli the GTX 280. In short, buying a 1200W psu when the GTX 280's prices drop even further.