Hmm I'm going to have to try this again.

The card requires 26 amps on the 12V rail. My PSU runs 2 12V rails at 18A each. The card has a 6 pin power socket and comes with an adapter that takes 2 4 pin molex connectors and combines them into the 6 pin.

My power supply has a 6 pin socket and multiple 4 pin molex. The PSU supplies 18A each on two separate rails if I recall right (at work atm). I tried connecting the 6 pin by itself, two separate molex connectors through the adapter, no go.

But I've been thinking, I assume that the different molex connectors are associated with one or the other 12V rail. Perhaps I wasn't actually connecting both rails, perhaps it was two molex fromthe same rail, though both were in different "bundles". I'll have to check that again tonight, since I assume that connecting two 18A capable lines would be additive and be sufficient on paper. It's a coolermaster 600 (can't find on their website) I'll have to pull the manual if I can find it. of course I might be right and still not have enough juice, running 2 HD, an audigy 2, a DVD burner, and the board itself might have enough load to torpedo me anyway.

The eternal balance between buying a PSU locally and getting a little less selection and higher prices instantly against going online and getting better prices but having to wait (and have it show up on plastic).