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Graphics card power requirement help

Last response: in Components
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December 31, 2013 2:08:19 AM

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.
December 31, 2013 5:52:54 AM

450watts are enough for this card. Plug and play
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a b ) Power supply
a b U Graphics card
December 31, 2013 6:36:26 AM

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?
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December 31, 2013 10:15:48 AM

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.
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a c 297 ) Power supply
a c 116 U Graphics card
a b Î Nvidia
December 31, 2013 6:50:03 PM

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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