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Is it safe to run a gtx 680 on a 450w psu?

I'm building a new machine in a few weeks and would like to salvage as many parts from my old one as possible. Specs:

i5 3570 (77w)
corsair 450w psu
ATX motherboard
8gb DDR3 (4x2gb)
1 5400rpm green sata
1 7200rpm black sata
1 256gb SSD
3 120mm fans and 1 200mm fan
1 CD/DVD burner

Right now my GPU is a radeon 5750 but I'm looking to upgrade to a gtx680. I am not planning on overclocking anything. Since I have a very good quality 450w psu, will it handle the load safely?

I put everything into a PSU calculator and came back with a minimum PSU wattage of 340w, so it seems okay but I wanted to double check.
8 answers Last reply Best Answer
More about safe 450w
  1. Nvidia official is 550W for that card. Max 195W card power: http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gtx-680/specifications
  2. I realize that, but in my experience GPU official ratings are excessive and probably based on a shitty PSU that would come stock with a store bought desktop.
  3. Best answer
    Safe... probably yes. You could try it without damaging anything.
    Will it work... probably no.
    A GTX680 needs two 6 pin pci-e connectors, and your psu only has one.
    Corsair is a solid brand, but if it had sufficient power to deliver 75w more to a second adapter, it would have done so.
  4. You should get a 670 since a 680 is not worth the extra money. Spend the money you save on a good PSU of around 550w to 600w. The new PSU you should buy will help future proof your system for future components if needed.
  5. You're right, I think I will go with a 670. Thanks for the advice everyone.
  6. Best answer selected by White_Noise.
  7. geofelt said:
    Safe... probably yes. You could try it without damaging anything.
    Will it work... probably no.
    A GTX680 needs two 6 pin pci-e connectors, and your psu only has one.
    Corsair is a solid brand, but if it had sufficient power to deliver 75w more to a second adapter, it would have done so.

    Only like using adapters as a crutch till a proper unit can be purchased
    Assuming ( oh no ) that the 450w mentioned is the VX;
    Except for the fact that it is rated 1a lower on the 12v but uses better capacitors, it is identical to the original Seasonic built EA500, that did have 2 x 6 pcie conns.
    Is also rated higher ( 33a v 30a ) than the Seasonic S12II 430 , that has 2 x pcie conns.
  8. White_Noise said:
    I'm building a new machine in a few weeks and would like to salvage as many parts from my old one as possible. Specs:

    i5 3570 (77w)
    corsair 450w psu
    ATX motherboard
    8gb DDR3 (4x2gb)
    1 5400rpm green sata
    1 7200rpm black sata
    1 256gb SSD
    3 120mm fans and 1 200mm fan
    1 CD/DVD burner

    Right now my GPU is a radeon 5750 but I'm looking to upgrade to a gtx680. I am not planning on overclocking anything. Since I have a very good quality 450w psu, will it handle the load safely?

    I put everything into a PSU calculator and came back with a minimum PSU wattage of 340w, so it seems okay but I wanted to double check.


    I suggest you just go for a nice 80 PLUS Certified Bronze (or higher) 600W SeaSonic PSU. (Or any other preferred good quality brand)
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