MY VGA requires 12 V 38A and my PSU is 12V 36A will it be ok ?

[biko1414]

I got a new vga that requires 400W 12V 38A PSU

and my PSU is 450W 12V 36A

can the vga work on this PSU ??

 

[rsmith13]

I doubt that it would work (at lease not for long). It's not just the video card that uses 12v; The motherboard, drives, etc. also need 12v.

 

[nukemaster]

It is not so clear cut.

What hardware do you have in the system and what power supply is it(quality makes a difference).

No single gpu video card takes 38 amps(456 watts. so you can NOT get a 400 watt power supply with that much current) on its own, that is for a full system. Depending on what is in the system, you may be MORE or may be able to get away with LESS.

Just to add an example here.

My 5770 that was in my media center lists a 450 watt power supply as a minimum, but with a light enough system(my media center), it had NO problems running on a 300 watt unit. Now days that system has a GTX 650 ti in it(same 300 watt power supply and still ZERO problems.).

You have to know what all the hardware needs(each part takes a certain amount of power.).

 

[nukemaster]

Why would a video card recommend a power supply that does not exist(I do not often see 456watt[38*12] from a 400 watt power supply.)?

If it recommends 400 watts, the 450 should be fine as it has 432 watts @ 12 volts.

Clearly I want to see IF this power supply can deliver what it says.

What hardware is in the system, what video card and what power supply.

Without this info it is hard to give an answer.

 

[biko1414]

here is my VGA card box and the minimum requirements on it
http://imgur.com/BHbM3IK
http://imgur.com/PLh9A7t

and here is my power supply
http://www.gigabyte.com/products/product-page.aspx?pid=2795#sp

 

[nukemaster]

Good and bad news for you.

If your system is light enough(no overclocking at a 95 watt cpu or lower), that card should not be much of an issue.

Number on, you can not add up power rails, so you actually only have 30 amps @ 12 volts not 36. That is not a top rated power supply, but should meet the MINIMUM requirements for a light system with that card.

I have to admit that I am at a loss as to how Asus can list what they do on the box for the card. simply put that math for 38 amps @ 12 volts = 456 watts.
They also seem to list that card at 150 watts max(this makes much more sense).
http://www.asus.com/Graphics_Cards/GTX650TIO1GD5/#specifications

Here are some numbers for the direct CU II version of the 650 ti card(runs at 1033mhz). As you can see, the card is NOT that power hungry.
http://www.techpowerup.com/reviews/ASUS/GeForce_GTX_650_Ti_Direct_Cu_II/26.html

Again, with careful planning, one can get by with a rather small power supply such as in the case of my media center(and its msi gtx 650ti cyclone).

 

[InvalidError]

can the vga work on this PSU ??

Almost no consumer-class single-GPU card uses more than 200W (or ~17A @ 12V) these days and the 650 should be nowhere close to that.

GPU manufacturers always grossly over-exaggerate their cards' requirement due to the large number of sub-par PSUs out there. This practice does not really do anyone any good IMO - it seems to just seems to confuse the heck out of people and make them buy grossly over-sized PSUs.

What we need is a Johnnyguru on steroids who can put more PSUs through their paces with extended burn-in testing to see which units really live up to their rating.