You would only be able to get your full money back (less the cost of sending it back) if it was DSR, for rma you would just get replacement...
Then I guess am keeping it, Until the 800 series comes out. It's a shame cause am quite a big AMD fan. With with DX12 due out soon and nivida teaming up with mircosoft to make mantle into DX12, Mantle will become a dead thing.