Choosing 2nd video card for 620w psu?

I have a computer and I want to get a second video card, but I am unsure which new card my PSU can handle. The components in my computer that take draw significant power are:

Nvidia 560 ti video card
intel 2600k processor
16 gigabytes of ram
1 ssd
1 hard drive

To power this I have a Antec 620 watt psu (48 amps on the +12v rails) that is about a year old now. The card I might be getting will likely be a radeon 7970 or 7950.
I recall checking that 2 560 ti cards could run on this psu, and power consumption seems to be 7950 < 560ti < 7970.
If I would rather avoid getting a new power supply, can I add one of those cards to my current computer build?

Thanks for your time.
14 answers Last reply
More about choosing video card 620w
  1. Sorry but you will not be able to run the nvidia 560ti and radeon card together. If you're looking to sli your rig, you will have to get another nvidia 560 ti.
  2. I use my cards for rendering with blender and cycles, which supports heterogeneous gpus.
    I need help concerning power usage specifically.
  3. yno192 said:
    I use my cards for rendering with blender and cycles, which supports heterogeneous gpus.
    I need help concerning power usage specifically.

    you cant install both nvidia drivers and amd drivers at one time. if you can its a *** ton of work
  4. sounds like you want to go for a workstation card, rather than gaming cards, which aren't going to perform well with what you are throwing at them
  5. @cbrunnem I use linux, so it is easier to get them running together.

    @daswilhelm I don't have much money, and gaming cards are faster at rendering (gpgpu) than most workstation cards with cycles. OpenGL is way faster on workstation cards, but I don't care about that much for what I need.

    I know of people who successfully use a set up like what I am proposing, I just need to know if the psu can power the cards.
  6. daswilhelm said:
    sounds like you want to go for a workstation card, rather than gaming cards, which aren't going to perform well with what you are throwing at them

    http://www.tomshardware.com/reviews/firepro-w8000-w9000-benchmark,3265-19.html
  7. You cannot run an ATI card and Nvidia card in SLI.

    The 7k series Radeon are going to be better for rendering and such, but if all you are JUST rendering and not gaming, a workstation card would be better.
  8. @cbrunnem, exactly, the cards I've mentioned (7950/7970 instead of workstation cards) are as fast or better, and cheaper, for my purposes.

    @Deemo13 sli/crossfire is unneeded/irrelevant.

    Does anybody have an answer as far as my power concerns go?
  9. I wouldnt run them in the same system with your power supply (I have the same one). Pretty sure it doesnt come with enough connectors for those cards.
  10. yno192 said:
    @cbrunnem, exactly, the cards I've mentioned (7950/7970 instead of workstation cards) are as fast or better, and cheaper, for my purposes.

    @Deemo13 sli/crossfire is unneeded/irrelevant.

    Does anybody have an answer as far as my power concerns go?


    ummm can you not read the titles? that was a gaming bench i linked?
  11. @cbrunnem Sorry, I went to the next page: http://www.tomshardware.com/reviews/firepro-w8000-w9000-benchmark,3265-20.html
    which has the relevant benchmarks.

    @Deemo13 The PSU came with what appears to be adapters for sufficient connectors.
  12. http://www.thermaltake.outervision.com/

    Punch your system info into this form and it will tell you the required power for those components. Very easy.
  13. look here your psu can handle any of those http://img716.imageshack.us/img716/1741/imageviewphp.png

    Uploaded with ImageShack.us
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