Graphics card power requirement help

I want to buy an Nvidia Geforce GT 630 1GB DDR3. Unsure whether my current power supply unit will do.
PSU specs:
450 Watt
25A@+5V, 10A@+12v, 14A@+3.3v, 1.5A@+5vSB
The Nvidia website says that minimum wattage of PSU should be 300W (and I have 450W). But many forums say that minimum 20A must be there on the 12v rail (and I have 10A). i'm confused.
if possible suggest a cheap external power supply unit for graphics card.
4 answers Last reply
More about graphics card power requirement
  1. 450watts are enough for this card. Plug and play
  2. That's an old psu probably with only 10amps=120watts on the +12 voltrail.

    Can you ugrade the psu?
    Do you have the budget for it?
    There really is only one +12 voltrail?

    Which cpu?
  3. Vic 40 said:
    That's an old psu probably with only 10amps=120watts on the +12 voltrail.

    Can you ugrade the psu?
    Do you have the budget for it?
    There really is only one +12 voltrail?

    Which cpu?


    I have an intel i5-2400 processor with 8gb ddr3 RAM @ 1333Mhz on my motherboard. And yeah unfortunately there is only one +12V rail. And I prefer not changing my PSU because it would be a little bit too expensive(when you combine the price with the Graphics Card price), and also, most importantly, a lot of work to do.
  4. ramanujan said:
    I want to buy an Nvidia Geforce GT 630 1GB DDR3. Unsure whether my current power supply unit will do.
    PSU specs:
    450 Watt
    25A@+5V, 10A@+12v, 14A@+3.3v, 1.5A@+5vSB
    The Nvidia website says that minimum wattage of PSU should be 300W (and I have 450W). But many forums say that minimum 20A must be there on the 12v rail (and I have 10A). i'm confused.
    if possible suggest a cheap external power supply unit for graphics card.


    Hi - That is not enough. It's not the total wattage, it's the only 10 +12v amps is the issue.
    A system with a gt630 should have 20 +12v amps, you do not have enough. The CPU, GPU, hdd, etc all draw their current from the +12v rail, 10amps won't cut it.

    reposting the same thread won't change the fact that your PSU has only 10 +12v amps.
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