If you're looking for advice, the best way to get it is by providing as much information as possible right from the start. This allows other readers the context they need to point you in the right direction. Here are some suggestions to improve your chances of getting solid answers: What should...
Of particular interest are:
Exact make & model of your Power Supply;
Case & cooling parts;
Monitor model & Hz;
Resolution you're running at;
What graphic settings level have you enabled?