How to give a gpu usage to cg - control how much gpu it can use?

[testmonkey]

I just started mining with cgminer and my gpu is being proper noisy, it is currently at 99% usage and 76c (and going up) which is a very high temperature.
Is there anyway that I can set it to use less of my gpu, say give it 50% usage.

Also I am getting some artifacts on the monitor.

Got any suggestions?


My spec:

- i5 3570k
- MSI 7950
- 8GB 1600mhz ram


EDIT: The settings that I put in the 'star miner.bat' file were ;
-I 10 -d 0 --temp-target 55 --auto-fan --gpu-memclock 300