SLI x2 GTX 780

Dyewitness · 17 Jun 2013 at 14:46

Hey guys

After some consideration, I have decided to purchase 2x MSI GTX 780s.
My question to those who are knowledgeable in these matters is,
What kind of performance increase should I expect over my single GTX 670 on my Asus P8Z77-V Pro. Will my motherboard enable me to benefit from such an upgrade?

Any info appreciated.

Chris

arc@css · 17 Jun 2013 at 14:48

I'd say around a 70% bump in performance. In some games you'll see even more, while in others there will be less. As far as I know, with that mobo you get 2 x PCIe 3.0 x 16 lanes so performance should be fine - even if one of those lanes drops to x 8 when a second card is added (whether it drops to x 8, I don't know). What's the spacing like between the lanes?

You have a 3770K, so that will handle multi gpu fine.

Dyewitness · 17 Jun 2013 at 14:55

So it would be a good investment then? And what about my motherboard, will this handle the upgrade?
2*PCIe 3.0 x16 slots (1@x16 or dual@x8); 1*PCIe 2.0x16

bemaniac · 17 Jun 2013 at 14:58

130% increase more like. Overclock them to the max too. They pooped on my crossfire 7970s

mcleish · 17 Jun 2013 at 15:01

Let me know how they perform. I thinking about doing it further down the road.

MOOGLEYS · 17 Jun 2013 at 15:02

What resolution do you game at ? I use 1440p and find a single 780 more than enough.

Yaayuh! · 17 Jun 2013 at 15:05

A. The performance will be awesome.
B. The motherboard is fine to give you said awesome performance
C. Is your PSU powerful enough?
D. If answer to C. is "yes" then purchase them now and smile. If the answer to C. "no" then purchase a better PSU and then answer D. again.

Jono8 · 17 Jun 2013 at 15:08

arc@css said:
I'd say around a 70% bump in performance.

More than that i would hope over a single 670!

Kaapstad · 17 Jun 2013 at 15:08

Performance wise on the Heaven 4 bench a single GTX 670 can score about a 1000 points and 2 x GTX 780s can score up to 3000 points.

http://forums.overclockers.co.uk/showthread.php?t=18487976

Dyewitness · 17 Jun 2013 at 15:09

My PSU is 850W modular..

any good? lol

se_vietboi · 17 Jun 2013 at 15:17

Probably 200% with perfect scaling.

Dyewitness · 17 Jun 2013 at 15:21

what about my psu - 850w modular.

will this handle the cards?

MOOGLEYS · 17 Jun 2013 at 15:25

Dyewitness said:
what about my psu - 850w modular.

will this handle the cards?

What brand ? A decent 850w will be fine..

Dyewitness · 17 Jun 2013 at 15:30

XFX I think it is

Dyewitness · 17 Jun 2013 at 15:32

https://www.overclockers.co.uk/showproduct.php?prodid=CA-000-XF

MOOGLEYS · 17 Jun 2013 at 15:38

70A 12v line is plenty. You will be fine with that PSU.

If you are on a single screen a pair of 780's might be overkill.

Yaayuh! · 17 Jun 2013 at 15:41

Dyewitness said:
https://www.overclockers.co.uk/showproduct.php?prodid=CA-000-XF

You're good to go.

Ignore these "its a waste" posts that will turn up. Just think "What would Clarkson do?"

MORRREEE POOOWWWAAAHHHHH

Dyewitness · 17 Jun 2013 at 15:49

Sexellent. Cheers for the info guys.

MOOGLEYS · 17 Jun 2013 at 15:53

Rossi~ said:
You're good to go.

Ignore these "its a waste" posts that will turn up. Just think "What would Clarkson do?"

MORRREEE POOOWWWAAAHHHHH

Clarkson is a tit.

It might not be a waste depending on resolution but spending out on a pair of 780's for a single 1080p is plain silly and a waste of money if this is the case.

Dyewitness · 17 Jun 2013 at 15:58

Im purchasing them so I wont need to worry about GPUs for a while. And I am also investing in some new monitors soon...