Hi Tom's Forums,
So I need a new PSU for my system because during the Black Friday madness I purchased 2 HD 4890's, but I am not sure what to buy. As of right now I am only using one of the HD 4890's.
The System:
Cpu: Intel Core i5-2500k OCed to 4.3GHz
Cooler: Cooler Mater Hyper 212 Evo
MB: Gigabyte ga-z68x-ud3h-b3 (rev. 1.3)
Memory: Crucial Ballistix sport 8GB (4x2) DDR3 1600
HDD: Western Digital Caviar Black 640GB
Optical: DVD Super Multi
Gpu: Hd 4890 OCed Core: 900MHz Memory: 1000MHz
PCI-Express: TP-LINK wireless adapter
Case: NZXT Gamma
Fans: 3 high speed 80mm
From what I read this setup is using about 300W with on-board graphics and 470-490W with one HD 4890. That kinda scares me because my current PSU, OCZ ModXStream Pro 500W, only carries 432W across its two 12V rails. The strange thing being that the computer is fully operational.
I am asking for help because even though I am fairly sure I need a PSU with 640-680W I am hoping I did the math wrong and don't because the new PSU I want maxes out at 620W. I normally don't second guess myself on these things, but logically the computer should not be running as well as it is and that freaks me out.
The PSU I want to buy is the Antec High Current Gamer Series 620W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371048For reference my current PSU's power configuration chart is the first shown after following this link.
http://www.ocztechnology.com/images/awards/mxsp_wattage_charts.jpgIn the event that the Antec 620 is not powerful enough what is a good PSU that I could purchase without breaking the bank? I would like to spend less than $75.