Is my PSU enough for a 7850

I need to buy the best GPU that i can get with the following info. Mainly used as a HTPC but i have been bit by the gaming bug again (its been about 8 years)

I5-2500k, asrock z68 pro3-m, ocz 60GB SSd, 2 TB hitachi HDD, Asus Blu Ray Drive, 2 x 4 GB Kingston 1600 RAM, Avermedia Tv Tuner, and i have Antec Neo Eco400c.

I was looking at AMD cards but open to anything (7850). Thanks for your help.
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More about 7850
  1. I don't think 400W is going to cut it, especially if you're going to overclock your CPU (which I assume you will since you have unlocked i5). AMD recommends at least 500W for HD 7850. It doesn't use much power, though, but it's good to be on the safe side of things.

    I have HD 7850 personally and I'm very satisfied with it, but it's probably overkill for HTPC. However, if you plan to game as well, then it should be fine.

    Just for reference, it can run BF3 on ultra 1680x1050 with steady 60-65 FPS.
  2. I live near a microcenter so at the time the mobo and i5 2500k combo was cheaper than an i3 2120 and mobo from newegg. I was not going to overclock but i figured it was nice for future use so i could extend computers lifetime. I have tried to find amp ususage needed for video cards because i know that is a more important than just total wattage of the unit (you get what you pay for). Doing the extreme power supply calculator i was getting 347 watts with 90% usage...figure i will not do that most htpc usuage and then at night when the kids are in bed i get to play some games. Diablo 3 and then some FPS...just getting back into this.
  3. newegg has a nice sale on the 620w version of your PSU. more then enough for your set up with 48a on the 12v
  4. Best answer
    An HD7850 requires a 500W PSU with one 75w 6-pin PCIe power connector and 28A on the 12V rails; amps on the 12 V rail is more important than watts.

    The Antec Neo Eco 400W with 30A on the 12V rail is electrically sufficient for your PC, but lacks a 6-pin PCIe power connector. Most GPUs come boxed with a molex-PCIe power adapter cable.
  5. When i open the case the power supply has a 6 pin pci power connector...would this setup work say for 2 or 3 months while i save up for a modular psu rated for 500w?
  6. Best answer selected by jnwhite22.
  7. Yes, it will work. :)
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