Possibly burned out SATA drives

I was installing some SATA hard drives last night, and I may have made a very dumb mistake. Long story short, I have a Zalman ZM600-HP modular power supply, into which I was plugged a four pin SATA power cable that has three SATA power connectors. In the tight spaces of my case, I mistakenly plugged the 4 pin SATA power cable (I'm guessing meant for 3.3V) into the top 4 pins of the 6 pin CPU2 connector on my PSU. I know, I know, very stupid thing to do, but the pins were keyed the same and in the confined spaces of my case I did not see that it was the wrong connector. So, I corrected my mistake, but when I power up my Asus P5B-E does not recognize any of the three SATA drives (One WD 500 GB and two Samsung Spinpoint 1 TB). Am I completely hosed, or is there a chance there's another cause for the drives not being recognized aside from my power supply snafu?