Just to put this out there..............
I just bought a XFX Black Edition Radeon R9 290X 4Gb 512-bit vid card & have ran it in AH........................(there is a thread that I have posted in concerning this card if y'all care to look)..............
I used a fan profile in MSI Afterburner to control the fans on the XFX Double Dissipation design cooler (uses a vapor chamber off the GPU w/ heat pipes coming off it w/ aluminum fins where the 2 fans blow air across......)
I have pushed the card to full stock AMD PowerTune-controlled GPU max boost clocks (1050 Mhz) & max GPU temp reached 65*C-68*C w/ fans running at 100% & GPU never de-clocked as temp was nowhere near the 80*C threshold & power was not fully used (had a lot more room to add extra power if desired). Can't say about OC'ing as I don't intend to OC it at all............
Can't answer for any others but I can answer for this Radeon.......................
..............
Hope this helps.......................
