Summary: I had 590 and 690 models and came to conclusion that I do not need dual GPU cards. Ti series suffices for me and saves some money as well. Otherwise, it is well build, overclocks without problems and did not reliability issues.
Summary: I've bought 2 of them surprisingly silent cards/ very stable (well it depends on your PCU) if I compare to my sli gtx 280/ extremely good performance and helpful drivers great buy worth the money
Summary: Powerful dual GPU. I bought this from Amazon Warehouse Deals, which is returned items that have been opened, and a lower price. I was bit scared to buy something this expensive, but since I was going to void the warranty anyway by water-cooling it, the lack of a strong warranty wasn't a deterrent.
Summary: First, anyone looking to get free Borderlands 2 from Amazon... You will not get it. They said they are only running the promo for GTX 660 ti versions. So, I had to call all over the place. I finally managed to get my code direct from Nvidia.