How much watts do 2 gtx 970s need?

Toggle sidebar Toggle sidebar
D

DoctorPokerFace

Honorable
Mar 18, 2015
26
0
10,530
Can a 500w power supply handle 2 gtx 970s? Because in the future i plan to maybe install another gtx 970 and i was wondering if a 500w PSU can handle both of them... is it a bit risky?


UPDATE: thx for your help. i got a new psu: EVGA supernova 750w b :)
 
Solution
popatim
If these are stock clocked 970's then they draw 150w each so then yes it is possible that a 500W PSU that can actually deliver and sustain that load could run the pair though there would not be much headroom at all and you might even need to limit yourself to 95w processor with no overclocking there either.
Sort by date Sort by votes
popatim

popatim

Titan
Moderator
Dec 2, 2009
38,905
980
135,890
If these are stock clocked 970's then they draw 150w each so then yes it is possible that a 500W PSU that can actually deliver and sustain that load could run the pair though there would not be much headroom at all and you might even need to limit yourself to 95w processor with no overclocking there either.
 
Upvote 0 Downvote
Solution
Dark Lord of Tech

Dark Lord of Tech

Retired Moderator
Aug 18, 2009
128,615
1,779
159,590


Guru3d.

Measured power consumption GTX 970

System in IDLE = 120 Watts
System Wattage with GPU in FULL Stress = 274 Watts
Difference (GPU load) = 154 Watts
Add average IDLE wattage ~10 Watts
Subjective obtained GPU power consumption = ~ 164 Watts

Measured power consumption GTX 970 2-way SLI

System in IDLE = 123 Watts
System Wattage with GPU in FULL Stress = 439 Watts
Difference (GPU load) = 316 Watts
Add average IDLE wattage ~10 Watts
Subjective obtained GPU power consumption = ~ 326 Watts
 
Upvote 0 Downvote
4Ryan6

4Ryan6

Champion
Apr 14, 2002
20,610
6
52,915


Are you ever in for a surprise, talk about underpowered, and you'll suffer the consequences of it!

The 439w full stress SR-71 posted was the GPUs themselves minus the system power.

Under powering an SLI setup is bad and can lead to disaster, Been There, Done That!

I would go with a minimum of 800w single 12v rail.

Good Luck

Here is Guru3D's power supply recommendation:

GeForce GTX 970 or 980 - On your average system the card requires you to have a 400~500 Watt power supply unit.
GeForce GTX 970 or 980 in 2-way SLI - On your average system the cards require you to have an 700~800 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. There are many good PSUs out there, please do have a look at our many PSU reviews as we have loads of recommended PSUs for you to check out in there. What would happen if your PSU can't cope with the load:

Bad 3D performance
Crashing games
Spontaneous reset or imminent shutdown of the PC
Freezing during gameplay
PSU overload can cause it to break down
Click to expand...
 
Upvote 0 Downvote
4Ryan6

4Ryan6

Champion
Apr 14, 2002
20,610
6
52,915
The most major problem I see today is so much is invested in investigating the upper tier of the computer components that the power supply to power it all, is the last consideration, that was fine when you were replacing your little 250w HP power supply, but in this day and time your power supply should be your first consideration.

At least that way when you do get your SLI setup running and the problems arise when there were none, guess what?

You need more power!
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom