I need to know if i should upgrade my power supply?? Please keep in mind that im also updating my ram to 16gb of ddr 1866, and also im adding a video capture device called the Avermedia live HD Please help this is my current setup:
Asus Sabertooth 990FX R2.0 AM3+ Motherboard - ATX, Socket AM3+, AMD 990FX/SB950, DDR3 1866 MHz, SATA III (6Gb/s), RAID, 8-CH Audio, Gigabit LAN, USB 3.0, PCIe 2.0, CrossFireX Ready
If you only have 1 GPU, 500w is more than enough. Make sure your 750w PSU is from a good company. Many PSUs from unreliable companies (coolermaster, raidmax, coolmax, etc.) only make 2/3 or less of their stated wattage.
Dammit, you made me look. It's a 650w!! Not sure why I had 450w in my head. It's an antec. I was especially concerned when I just went to the watt calculator site, entered my OC info, and it said I needed 410 minimum.
Still, I agree with you above that 500w should be more than enough, but OP should run the calculator to be sure.