Sign in with
Sign up | Sign in
Your question
Solved

Ordered 2nd GPU // Need New Power Supply?

Tags:
  • GPUs
  • Power Supplies
  • Tom's Hardware
  • Graphics
Last response: in Graphics & Displays
Share
March 30, 2014 4:37:03 PM

Hi there, Tom's Hardware.

Last night in a fit of fatigue I ordered a second GPU for my rig. Since I can't seem to cancel the order, I'm thinking what the hell. But then it hit me. I'm wondering if I'll need a new power supply. I'll leave the pertinent details below.

Motherboard: Asus P8Z77-V PRO
Processor: Intel i5-3570K w/ Stock Cooler
Graphics: GTX780-DC2OC-3GD5
PSU: Corsair 750W, Gold Certified (Can't recall what kind it is, and my computer is somewhat inaccessible to check right at this moment)

I think those're all the directly influenced things when it comes to PSU. If I need to add anything, lemme know. Thank you for the help.

EDIT: Forgot fans.

1 x 200mm blue LED front fan
1 x 200mm blue LED top fan
1 x 200mm blue LED side fan
1 x 120mm rear fan

More about : ordered 2nd gpu power supply

March 30, 2014 4:40:35 PM

A 780 has a peak power consumption of 208 watts. Therefore, two of them will add up to 416W. That leaves roughly 300W for the rest of the PC. Do you have any idea if you have enough connectors to support 2 cards?
m
0
l
March 30, 2014 4:47:26 PM

pyr0_m4n said:
A 780 has a peak power consumption of 208 watts. Therefore, two of them will add up to 416W. That leaves roughly 300W for the rest of the PC. Do you have any idea if you have enough connectors to support 2 cards?


I do. The motherboard has two PCIe 3.0 slots, and came with an SLI bridge. And the PSU does have another power connector, if that's what you meant. I derped a bit. But would that 300W surplus be enough for the rest of my system?
m
0
l
Related resources

Best solution

a b ) Power supply
March 30, 2014 9:01:21 PM

The total power draw on your psu should be around 600W so you'll be fine.
Share
a b ) Power supply
April 5, 2014 3:58:43 PM

Here is Guru3D's power supply recommendation:
•GeForce GTX 780 - On your average system the card requires you to have a 550 Watt power supply unit.
•GeForce GTX 780 2-way SLI - On your average system the cards require you to have a 800 Watt power supply unit as minimum.
•GeForce GTX 780 3-way SLI - On your average system the cards require you to have a 1200 Watt power supply unit as minimum.

If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina.
http://www.guru3d.com/articles_pages/asus_geforce_gtx_7...
m
0
l
!