ASUS' new GeForce GTX 580 DC2 uses a massive triple slot Direct CU II heatsink that increases cooling performance significantly. As a result the card is extremely quiet in both idle and load - quieter than many midrange cards. ASUS has also increased the operating clocks of their design, all this for a small price increase of $5.
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