No SLI in GTX670

pepsimax · 26 Oct 2012 at 16:56

Hi, I have two 4gb KFA2 GTX 670s, and the SLI isn't working. Both cards work, (I have had monitors plugged in to both and they've all worked etc.), but the SLI doesn't work (I've tried two different SLI Bridges on both slots)
Spec:
3770k
Asus P8Z77-V PRO/Thunderbolt
16gb samsung green

andybird123 · 26 Oct 2012 at 17:00

what happens when you click enable SLI in the nvidia menu?

stuie · 26 Oct 2012 at 17:00

when you say it doesnt work in what way? does it list as sli in nvidia control panel?

pepsimax · 26 Oct 2012 at 17:01

Where is the option? There is no listed sli etc.

JamesM · 26 Oct 2012 at 17:13

Reinstall the drivers, then there should be an option in the Nvidia Control panel to enable SLI

pepsimax · 26 Oct 2012 at 17:14

I've tried that, including legacy and beta drivers. Perhaps you can recommend a driver remover?

Rusty0611 · 26 Oct 2012 at 17:15

"Maximise 3D performance" in the SLI/Surround/PhysX submenu is what you should click.

The graphic is pretty clear - it has the two GPU's with green arrows pointing to one monitor.

pepsimax · 26 Oct 2012 at 17:15

Where is this option? I should probably point out I'm running 3 monitors

Rusty0611 · 26 Oct 2012 at 17:17

pepsimax said:
Where is this option? I should probably point out I'm running 3 monitors

Then "Span displays with Surround" is the option you need. Both GPU's will then enable.

pepsimax · 26 Oct 2012 at 17:18

Except they don't. The control panel crashes when I try running in surround on seperate cards, (two monitors on one, one on the other), and only one GPU is used when I put all three monitors on one card.

Rusty0611 · 26 Oct 2012 at 17:20

What are you trying to do? Triple screen gaming with two cards?

Surround requires the third screen to be plugged into the second graphics card. You can only plug them all into one card if you're running one card.

pepsimax · 26 Oct 2012 at 17:21

No, surround works flawlessly on one card, that's a feature of the 600 series. The crashing is when you have the third screen on the second card because SLI doesn't work

Rusty0611 · 26 Oct 2012 at 17:22

Does it work with one monitor attached?

Calm yourself down as well if you want help.

pepsimax · 26 Oct 2012 at 17:23

No option

Rusty0611 · 26 Oct 2012 at 17:24

So the Maximise 3D performance button isn't there or able to be applied?

pepsimax · 26 Oct 2012 at 17:25

It isn't there. Nothing to do with sli is there (I have used sli in the past so now how it works)

Rusty0611 · 26 Oct 2012 at 17:30

Take a screenshot of the screen.

Are both cards showing in the device manager?

pepsimax · 26 Oct 2012 at 17:35

The lack of windows aero is completely different, that's to do with a program I'm running

Rusty0611 · 26 Oct 2012 at 17:44

I assume you're greeted with the same options if all monitors are unplugged bar the middle one? It's like the bridge isn't working you've said you have already tried 2. Interesting...

pepsimax · 26 Oct 2012 at 17:46

Yup, one of the bridges even worked with another pair of cards on a previous motherboard :/