Summary: There is no question that the game performance of this card is excellent. It's connectors are also well laid out so installation was a breeze. My problem is that the on-board fan failed after less than 1 year. Unless you are opening your computer up or familiar with examining the log files of your PC, you probably won't know why your system is suddenly having unexpected reboots and shutdowns.
Summary: Bought mine through new egg. Seem to work fine and even ran great for a while under Windows 7 64bit. Unfortunately it was too late when I realized I had an issue. The black and grey screens of death requireing hard-reboots started happening when I started actually putting stress on the card with Mass Effect 2. It only got worse when I got a new 23" monitor (upgraded from a 19") and started running a higher resolution. Long story, short-- it is now RMA'd with Sapphire.
Summary: I got this card about 2 weeks ago. It is quiet and performance is quite good -- a big improvement over my GTS 8800 512, however I've had problems with some BSODs when launching games. It only happens when launching, and it happens 100% on some games. It's not power (I have a good 900w P/S), it's not driver (I have the most current from ATI).
Excerpt: Good size, easy install, rapid shipping from Newegg! Won't operate! So I believed that the PSU may well be the issue and spent 160 for a PSU that didn't repair the problem, even though I'd require one later on down the road anyways. I'm sure the card is fantastic, it's a compatibility concern. The MB that I wanted to set up this card in is an older Abit KN8 SLI with a NForce 4 chipset and PCie V1..
Excerpt: I have but to expertise the cards pros. I got the Radeon HD 5700 and It showed no signal. I had a geek squad employee appear at it and he told me it was a poor card. I sent it back and the very same factor occurred with the new card I received. It ought to be a thing else. My slot operates fine it runs other cards no difficulty. My power provide is adequate. I don't know what to do now. The card it's self looks like it would be an amazing piece to add to my pc.