I have to admit this is the first post about a 290x being to cool What I would suggest is to disable ULPS..give it a try...can't hurt.
Do you have Overdrive enabled in the CCC? Do you have "Target temperature" settings in Overdrive? Is your power setting at +50?
Maybe you should copy/move your "Newcomers" post over to this,some one might understand what you are trying to achieve.
And your other post re black sceen fix.
Easy.....Set a custom fan curve in MSI Afterburner and set it to about 20% fan speed till you hit 70-80c (your preference) then ramp it straight to 100%