Try the 310.70 drivers. I have similar problems with the latest WHQL.

I have the same board and the card's will only work in slot 1 for 1 card, Slot 1,5 for 2x SLi and Slot's 1,3,5 for 3x Sli. 
Also look in the bios and make shure they are seen.

I have a quick question, have you tried your monitor on every display port available? I don't see anyone recommending this, and I didn't see you say that you did it.

Naviss

I just tried that as you posted. Still same issue. Black screen.

I use a HDMI.

Did you try DVI ports as well? I know this sounds so silly but sometimes it's just the basics lolz.

My TV I use (Panasonic 42" LED 120Hz) doesn't have support for a DVI.
 
I'll try one of my smaller monitors (20") with a DVI port shortly.

Just tried the 310.70's. Black screen as well.
 
:( Guess it's the mother board?

Can you post a screenshot? There are some Intel drivers that might need to be installed.
 
Intel driver update utility:
http://www.intel.com/p/en_US/support/detect/
 
ASUS driver downloads:
http://www.asus.com/support

Would flashin my bios help?

This is a fresh install just built the rig tonight.
 
I tried using my system on my older monitor, VIA DVI. It worked fine even when enabling sli..
 
But still wont work on my tv, Through hdmi? I even changed the hdmi cord? Any idea's about that?
 
HDMI works fine through one card but once I enable SLI it blacks my screen. 
 
I also reset my tv to factory settings, Still noting. :(
 
Just tried lowering the rez to 1280, Before enabling SLI. Still black screen. **** is the problem? It's not hardware does the 680's not do sli in hdmi?
 
UGH I can't even find anything online about this. What could I do? 
 
So I did get SLI to work on the tv using a DVI to VGA cord since that tv doesn't support dvi. But my max res is only 1600 x 1024 lol!
I also called eVGA support but they didn't know either said it should work fine but it does not.

but are you sure that then the Desktop doesn't come back?
'cause it goes black also to me but then it goes fine...
try to use the DVI cable and select which screen must be primary and secondary from the nvidia panel...
if you haven't already!

I never tried my TV with SLI but it did work fine using HDMI and a single GTX 680. I had to RMA a 680 and a replacement should arrive Monday. I will try my TV with SLI and let you know if I have any problems.

Well... Your TV could be not set to 1080p... Go in Nvidia control panel under "Change resolution" and see what it's set at... I'm completely lost but nobody else is commenting so we might as well try something lol.

If this is a fresh install of Windows there are some DX files missing by design. You should run the DX update to fill in the missing versions.
 
http://www.microsoft.com/...oad/details.aspx?id=35

Just wanted to update everyone but also bump the thread. Since the original problem I came here with has been fixed. So to give some advice to anyone else that may run into this same issue.
 
This is what I've done;
 
1. Don't use HDMI to HDMI when you're going to SLI. (It doesn't work! A buddy of mine also told me that where he works they can't use sli when running HDMI to HDMI. Keep in mind I'm NOT saying it can't work just saying for myself and my buddy at his work place it can't be done.) So this is where I'd first start changing things if you run into the same problem. I went and bought a cheap (20$) DVI to HDMI cable.
 
2. Switch around the DVI ports on your GPU! (For me it was rather odd. The top DVI port on my first 680 worked fine, Then en-abling SLI I black screened again. Making the bottom DVI port active. Prolly some common sense thing of you're suppose to use the bottom one for SLI, I don't know but something anyone could over look or try!)
 
3. Resolution! Make sure your computer in the control panel & NVidia control panel shows the correct monitor you have hooked up. So you can get the correct resolutions you're aiming for. Somehow though mine did have the correct monitor or in my case TV showing. It said max Resolution was 1024x768.
 
To fix this I had to completely reformat the OS again. I tried downloading Driver sweeper booting into safe mode and completely removing things but still it didn't work. Reformatting did.
 
Anyway thank you to everyone in this thread for all the help and idea's. I hope the way I found to fix mine can help anyone else in the future.
 
My only issue now is as I said; I can see on screen my PC post, And load the windows screen but when I get to the login screen my tv blacks out until I unhook the DVI cable and plug it back in.
But I'm heading to the NVidia forums to seek help for that!