GTX 780 compatible with Corsair VX550?

Toggle sidebar Toggle sidebar
M

makaveli93

Distinguished
Jan 28, 2010
2
0
18,510
I have a 550W PSU http://www.newegg.ca/Product/Product.aspx?Item=N82E16817139004.

I was wondering if it would work with the GTX 780? Apparently the 780 requires 42A of power, my PSU offers 41A. Will this mean its guaranteed not to work?

I am running a fx-8320 processor and M5A97 r2.0 mobo.

Thanks!
 
Solution
nostall


From an earlier post by ko888:
"The CPU and the graphics card are the two biggest power consumers. They both get all of their power from the +12V rail(s) so the power supply must have the appropriate maximum combined +12 Volt continuous current rating.

For a system using a single GeForce GTX 780 graphics card NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous...
Sort by date Sort by votes
S

SNA3

Honorable
Jul 17, 2013
1,983
0
12,460
if you do not over clock it will work. with your cpu and mobo and soe hd and fans , it will need 500 Watts with the card. 1 watt difference is no big deal ...

if you are over clocking, it will not work , get 650 watt power supply.
 
Upvote 0 Downvote
eddieroolz

eddieroolz

Splendid
Sep 6, 2008
7,057
0
25,860
Considering you're running a FX-8320, a GTX 780 on 550W/41A PSU would be stretching your luck. The last thing you'd want is to have the PSU die, possibly taking the motherboard, CPU and GPU with it.

In this case, I'd recommend an upgrade to something that can comfortably handle a GTX 780.
 
Upvote 0 Downvote
Sakkura

Sakkura

Illustrious
Aug 22, 2011
8,129
3
37,965

41A can comfortably handle a GTX 780 and FX-8320, at least at stock clocks.
 
Upvote 0 Downvote
eddieroolz

eddieroolz

Splendid
Sep 6, 2008
7,057
0
25,860


The OP states that GTX 780 requires 42A while his PSU supplies 41A. Usually the recommendation is to exceed the 12v rail amperage.

 
Upvote 0 Downvote
Sakkura

Sakkura

Illustrious
Aug 22, 2011
8,129
3
37,965
The official requirements aren't that reliable. They just slap on a big number to avoid people overloading low-quality PSUs.

The GTX 780 and FX-8320, both at full load, will draw about 31A in total. Given how rare it is for GPU and CPU to be at full load simultaneously, I would say 41A on the 12V rail is fine. But overclocking would be pushing it.
 
Upvote 0 Downvote
nostall

nostall

Splendid
Nov 28, 2012
3,244
12
23,865


From an earlier post by ko888:
"The CPU and the graphics card are the two biggest power consumers. They both get all of their power from the +12V rail(s) so the power supply must have the appropriate maximum combined +12 Volt continuous current rating.

For a system using a single GeForce GTX 780 graphics card NVIDIA specifies a minimum of a 600 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 42 Amps or greater and that has at least one 6-pin and one 8-pin PCI Express supplementary power connectors."

The manufacture specifies the power it does because there is other equipment to run inside the computer. In addition, the PC and PSU will heat up and often, not always, the power supply will be unable to deliver the needed power.
Technically you can probably run that new card with your 550, it's a really nice little PSU (http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=62); the others here are generally correct-your system will probably never need full power. But ask yourself: What if it did? If it can't get it it will crash.
Also, if your PSU is on the edge of maximum it will have to work hard all the time; this decreases lifespan of the PSU.

And, there is always mention of overclocking: You might never overclock, but that card is going to do a bit of it automatically with its boost function (don't know the name).

SNA3 is correct, you should consider something around 650watts.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom