I had this problem with PNY with one of their other products - I bought a mid-tier video card from them (GeForce GTX 570), and after a hardware failure, sent it in for an RMA. Over the course of multiple RMA mailings, at various times they would send back a visibly physically damaged 'replacement' card, a 'replacement' card that was a different size/shape (and obviously a different model), and in one case my broken card, that I sent them initially. It was as if they had a pile of 'works well enough to boot Windows' cards and RMAs that weren't totally broken got put into the pile, while they pulled other cards out of the pile to ship to customers.

It was pretty impressive to be able to watch shady cost-cutting in action. Too bad it cost me around $120 in UPS shipping fees.