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Hd 6770 atx 450w psu

i have ATI RADEON HD 6770 gpu
and i want to know if i would have to replace my psu,
it is ATX-450W
and my system sepcs are as follows:-
Core i3 530 2.9 Ghz
6 gb ram
2 tb 500 gb wd hard disk
10 answers Last reply Best Answer
More about 6770 450w
  1. What brand and model is your PSU?
  2. For a system using a single Radeon HD 6770 graphics card AMD specifies a minimum of a 450 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 25 Amps or greater and have at least one 6-pin PCI Express supplementary power connector.

    Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

    Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

    You may find power supplies on the market that supply more than enough Wattage to run the system. However, some of them lack Sufficient Amperage capacity on the critical +12 Volt rail, which is necessary to properly power the critical components in the system (i.e. CPU and GPUs). This is the reason why graphics card manufacturers may overstate the power supply wattage, usually by at least 50 Watts, in an attempt to take into account some of those power supplies that have the weaker +12 Volt rail(s).

    You need to post the brand and model number of your power supply unit if you expect a correct answer.
  3. i dont know how to upload a photo but here is the link

    or the forum code(i dont know how to use this)

    Uploaded with
  4. Best answer
    OK, thanks for the pic.

    That PSU is a low quality unit. You can tell right away by the +12V rail which only has 16A. If you do the math (16A x 12V = 192W), that "450W" power supply is only able to supply 192W to the components that need the most power. Compare that to a high quality Corsair VX450 power supply which has 33A on the +12V rail, or 396W.

    So, I strongly suggest you upgrade your power supply before upgrading to a video card. Corsair no longer makes the VX450, but you can get a Corsair CX430 for pretty cheap ($25 after MIR, still a good deal without the rebate at $45):

    The CX430 has 32A on the +12V rail, by the way. So even though its listed as only 430W, it's far better than the 450W power supply you currently have.
  5. Best answer selected by shaantanu.
  6. thnxxxx for the reply!!!
    which one is best among these:-
    Corsair CMPSU-600CXV2UK 600 Watts PSU
    Corsair CMPSU-650TX 650 Watts PSU
    Cooler Master GX 650 Watts PSU
    Corsair VS650 650 Watt PSU
    Corsair Enthusiast Series Modular TX650M - 80 PLUS Bronze Certified 650 Watt PSU

    these are available in india!!!
    if u want to recommend other PSU's you can recommend other !!
    my price range is btw 4000 rs to 6000rs (70$ to 100 $)
    nd thnxx fr the reply again!!!
  7. Your ADCOM ATX-450W generic power supply unit doesn't meet the system power supply requirements needed to be able to use a Radeon HD 6770 graphics card.

    You would need something like the following:

    Seasonic SS400BT PSU for Rs. 2734 (Inclusive of taxes)
    • maximum combined +12 Volt continuous current rating of 30 Amps
    • two 6-pin PCI Express supplementary power connectors
  8. or Seasonic S12II 620 Watts PSU
  9. I would like to upgrade my pc to a new processor in a few months so i would want to buy a future proof psu !!
    but thanx for the reply ko888!!!
  10. shaantanu said:
    I would like to upgrade my pc to a new processor in a few months so i would want to buy a future proof psu !!
    but thanx for the reply ko888!!!

    You're welcome. You never mentioned, in your original post, that you were making any CPU upgrade.

    My recommendation would be able to handle any processor upgrade you were planning on making.

    The Seasonic S12II-620 Bronze is a good choice for future graphics card upgrades.
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