So  I have a rig running (4) XFX R9 290s for about 3.5mh/s. I was just wondering what are the optimal cgminer settings for these 290s. Right now they are all running around 83-84 degrees, is this too hot or are they suppose to run this hot?

My settings are:
GPU: 1000
Mem: 1350
Intensity: 20
fan speed ~75%. (auto)