Be Quiet's Straight Power E8 400W is a non-modular power supply coming at a very aggressive price point. According to the manufacturer it boasts an impressive 89% efficiency, also the unit is very quiet - no surprise, given the company name.
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips