Enough wattage for 770 SLI?

Hardware Hub GPU
1

Right, so i've gotten an offer for my current eVGA gtx 760 acx, and for that, and a bit of cash, i could get an eVGA gtx 770 4gb, but i was wondering if my corsair cx750 750 watt psu could handle going 2-way SLI with those

The rest of my system is an AMD 8350, asus sabertooth 990fx r2.0, and a mechanical harddrive, and a SSD

2

Power draw of a 770 at load according to this is around 380ish watts.

http://www.anandtech.com/show/6994/nvidia-geforce-gtx-770-review/16

TDP of an 8350 according to this is 125W.

http://www.techpowerup.com/reviews/AMD/FX-8350_Piledriver_Review/

 

380x2=760+125=885

without HDD or SSD

 

You would need to get a 1000W PSU to power that... If you don't overclock.

3

What if i only get the one, and overclock that? also would i be able to get a 780 and overclock that?

4

Yep, you could do that just fine.  I recommend it too.  Single card solutions are always better than two.

5

Though it wouldn't be as powerfull, but i think that's what i'm gonna go with, since getting a 1000+ watt PSU is rather expensive, at least where i live...

6

TDP is heat dissipation, not maximum power draw. Easy to get confused.

I should think that overclocked 770 would pull about 250W each. It's only under a synthetic bench that you will see 300W on each card, their maximum power draw, but games are not quite as intensive as synthetic benchmarks. So 750W is sufficient. However, I would recommend grabbing a single 780, anyway. Dual GPU solutions can be troublesome

7

I totally read those graphs wrong... time to go to bed...

edit: see how the graph says "total system power draw"

8

I'm doing a lot of that from memory. I haven't slept at all, otherwise I would be equally terrible. I have displayed some rather terrible grammar this morning.

Happy 10.40AM-ish

9

I'm showing it too.  Thanks for correcting that, I'm off.  

10

Your psu will be fine. Its only in benching etc that you'll see big consumption numbers. You can always grab a cheap watt meter to measure your rig. If you see that it pulls close to the 700 mark under load than maybe look into an upgrade.

11

I have the exact set up as yourself, I have been considering a second 770 to go SLI and I have a 750 watt, I doubt it should need any more.