Enough power from PSU
Hi all, I have a Raidmax 500 watt PSU running a Phenom II x4, a GTX 660, 1 HDD, 1 DVD drive, and two case fans. I'm wondering if adding a case fan, switching from a 80mm to two 120mm cpu fans, and possibly adding two fans on a fan card that mounts below the graphics card will make a big difference power wise and if it'll be close to my 500w limit. Also do USB's use a lot of power? I have 2-3 used right now but soon that'll be 4-6. Couldn't phrase this question well but thank you!