So you were running it first on Low wattage? with different coolers? then upgraded the PSU put it back in hoping to get some more milage outa it and nothing?
The only things i can think of is
A) your PCI-E slot on the motherboard is no longer correctly working(if you have another try that out)
B) The PCI-E slot connecter on the card got hit with static and no longer works killing the card.
You can hopefully still RMA the card to your vendor, that would always be my first choice in such subjects.
ok so i installed it with the stock cooler....worked....
took it out to install my zalman....worked...
took it out cause my power supply sucks....
put it back in...and it didnt post!!!
From what this says you are saying that after you installed your zalman cooler, it "DID" work. You took it out to change the PS and now it doesnt work. Take the powersupply that you took out and put it back in to test and make sure the card is still good. Could be your new ps is pooped. Just try it.
Sounds like a problem with your PSU since your other card powered up. I'm assuming you remembered to plug the 6-pin pci-x in to the video card, whilst R&R'ing the card? Doesn't that PSU have modular cables? Is the cable going from the PSU to the video card firmly inserted into the PSU? If so, try borrowing another PSU and try it before RMA'ing the card.