I just replaced my 5770 with a 7970 and can't get my machine to stay running. I can boot it up, but before windows loads it goes into power save mode. I went into the bios to see if I could find anything there and while cruising around in the bios....monitor goes into power save mode. I can hear the fans on the care spin up real fast right before it does it. Card feels cool to the touch so I don't think that is the issue. I have a 750w PSU but wondering if the card is not getting enough power.
Yes I can see the BIOS POST screens. I can even get into the bios and start poking around but then I hear the fans ramp up and power save kicks on.
When you're in the motherboard's BIOS setup poking around, and that happens, then it is definitely the graphics card because no Operating System has been loaded yet so no graphics card device drivers will even come into play.
For a system using a single Radeon HD 7970 graphics card AMD specifies a minimum of a 500 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 38 Amps or greater and have at least one 6-pin and one 8-pin PCI Express supplementary power connectors.
Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.
The Corsair Enthusiast Series TX750 V2 (CMPSU-750TXV2), with its combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single Radeon HD 7970.
If you have another working power supply, that you can test with, then do that to see if your results are any different.
Thanks for the reply, mine is actually the original though, not the V2. I called and spoke with the reps at XFX and they stated I should have no issues with this combo. They suspect something wrong with the PSU or the card. I do have another older machine that has an 850 PSU that I'm going to try. If that doesn't work then the card will go back to newegg for a replacement.