I have the same card. One of the GPUs went out of it in May. I sent it to Diamond in May. I got an email today that I will get the money credited back to my account. That is the longest RMA I have personally every seen.
I think they must just go in spurts, as literally today I got a notice that my RMA was processed and a refund granted through newegg.
+1 on agreement: the longest RMA process ever.