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Not doubtful. I've run several benchmarks on my setup and no crashes or faults whatsoever. Stable as stable can be. No overclock of course. Not sure why you are using so many watts. Do you have a large overclock? Tomshardware confirmed quad fire on a 1000 watt PSU...

I have a 295x2 and an 290x in tri-fire on a PC Power and Cooling 950 watt power supply with my 4670k all at stock clocks. A quality 1250 watt would be fine for #2 295x2 in quad-fire.

I have never disabled ULPS, but I have never had a reason to. I love the fact that my dual GPU card shuts down completely and uses no electricity when not in use.

Asus Maximus VI Hero / i5-4670k / Radeon R9 295x2 + R9 290x Triple Crossfire / PC P+C 950 watt power supply / 16GB DDR3 1600 / 250GB Samsung 840 EVO for OS and 250GB Samsung 840 for games

I had a 7970 and 7990 in Tri-fire and every now and then this would happen to one or two GPUs. Using MSI Afterburner, I made a overclock preset for 1000/1500mhz. Whenever the GPU(s) would get stuck in a low power state I would just apply the preset and the clocks would reset to normal. Not sure...

Install MSI Afterburner. The hardware monitor can be configured to display GPU Temps, Framerate, GPU Usage, Core and Mem Clocks, and memory usage for ALL GPUs which IMO will help you narrow down the problem. I keep Afterburner running on a second monitor at all times for my Tri-Fire setup...

Having a 7990 as my secondary GPU is like having a twin turbocharged 5.0 mustang. The 5.0 will get you where you want to go quick, but when those turbos kick in WATCH OUT. The only issues i have are heat and many games do not work properly in X-fire upon release. But AMD is pretty good with...

I have the setup described. I have an i5-4670 (stock clocks) an XFX 7970 DD (OC'd to Ghz Clocks) in slot 1 and a 7990 (stock clocks) in slot 2 in Crossfire with one open slot in between them. Powering them is a PC Power and Cooling 950W power supply. Cards are running at PCI-E 3.0 x8. I have...