So far I'm loving its performance to death (hopefully not literally), its over twice as powerful as my old GTX650, but a couple things are worrying me.
Using GPU-Z and playing Far Cry 3, everything maxed except texture filtering:
GPU load bouncing around 95%+
Power consumption is topping out at 100% TDP, I saw it go to to 100.12% a couple times.
The card temperature is reaching 81 degrees, but usually sits at 79
And GPU-Z is telling me "PerfCap Reason: PWR," which from what I could gather from Google means the performance is being throttled because of power reasons.
I have a Corsair SP120 fan blowing air from the side case vent onto the GPU and a Stock 120mm Antec case fan exhausting out the top. PSU sits at the bottom fan facing upwards. Corsair H60 fan and radiator occupy the rear. The onboard fan was only reaching 55% speed so I downloaded EVGA precision to rectify that, but as of writing this I haven't gone back into a game to check it.
So in summery, am I putting too much strain on my PSU? And am I reaching dangerously high temperatures on my card? Thanks for any help!
The "PerfCap Reason: PWR" is just the GPU's "boost" feature. Whenever there is room in that power envelope, the GPU "boosts" its clock. When it hits its max TDP, the clock is reduced. As far as your temps go, those are ok. You can play around with the fan profile to help reduce them if you like. Tom's reference 660 was hitting 76 under load, I imagine that OCed card you have there runs a bit hotter: http://www.tomshardware.com/reviews/geforce-gtx-660-gef...
As far as your PSU goes, I don't know anything about "Coolmax" brand PSUs. You should probably get a better-quality unit. But it doesn't appear to be causing you any problems right now - if your PSU was too weak for the 660 then the computer would crash and be very unstable.