A few days ago the fan on one of the XFX nVidia GeForce 8800GS Alpha Dog cards in my gaming rig died. There are a pair of them in a SLI configuration and when the fan died on one, it overheated and shut down the system. As a safe gaurd, the system would not turn on with the bad card installed.
At first I thought it was the power supply. I got a RMA on the Ultra 650W power supply and got a 750W upgrade. After replacing the PS, the system would still not even post. So as part of troubleshooting, I stripped the system down to minimum components (No hard drive, single memory stick, one video card). The system booted with one video card installed, and started beeping at me with the other card installed.
I contacted XFX to get my 1 year old video card replaced/fixed. I an RMA for the card and XFX determined it was a faulty card. No sooner that I got the email from XFX about the faultly card, the other card went bad. I actually heard the fan come to a screeching halt. XFX informed me that they no longer make the 8800GS card and offered me a free upgrade to the GeForce 9800GT! Before they even knew the second card went south, XFX offered a free RMA upgrade to a 9800GT for the second card since they were in an SLI configuration. So kudos to XFX for standing behind their products and offering great service.