Configure SLI Not Available

NaseebyWali · Dec 12, 2013

Good afternoon forums,
I am having trouble enabling SLI on my system and I hope you can help me resolve this issue.

System Specs:
-Motherboard: Asus Sabertooth Z77
-OS: Windows 7 Professional 64-bit
-Video Cards: (1) GTX 670 4GB FTW, (1) GTX 670 4GB
-PSU: 800W

If there is any other information you need, please ask.

Both Video cards are detected in device manager and on The Nvidia control panel, however, the option to configure SLI does not appear.

I have provided pictures to ease explanation.

Nvidia Control panel:
http://i.imgur.com/sVpdd6G.jpg?1

GPU-Z Settings for both Cards:
Card 1: http://i.imgur.com/YOePAxL.gif?1
Card 2: http://i.imgur.com/R2cznH2.gif?1

I look forward to resolving this issue!
Thanks in advanced!

ahnilated · Dec 12, 2013

Do you have the SLI cable across the 2 video cards?

NaseebyWali · Dec 12, 2013

ahnilated :

Yes I do.

ahnilated · Dec 12, 2013

I found:

Supports NVIDIA® Quad-GPU SLI™ Technology
Supports AMD Quad-GPU CrossFireX™ Technology
Supports LucidLogix® Virtu™ MVP Technology *1

so it appears your motherboard supports SLI. You don't have the primary video card as the onboard one do you?

ahnilated · Dec 12, 2013

double post

NaseebyWali · Dec 12, 2013

ahnilated :

I appreciate your prompt replies!
I'm sorry, what do you mean by as the onboard one?

ahnilated · Dec 12, 2013

The onboard video, there is a setting you can change in the bios.

Integrated Graphics Processor
Multi-VGA output support : HDMI/DisplayPort ports
- Supports HDMI with max. resolution 1920 x 1200 @ 60 Hz
- Supports DisplayPort with max. resolution 2560 x 1600 @ 60 Hz
Maximum shared memory of 1696 MB
Supports Intel® HD Graphics, InTru™ 3D, Quick Sync Video, Clear Video HD Technology, Insider™

NaseebyWali · Dec 12, 2013

ahnilated :

I'm actually quite new to the BIOS settings. How may I go on changing this setting? I have contacted ASUS several times, and honestly, they really are no help. They avoid the problem.

ahnilated · Dec 12, 2013

In your manual/bios there should be a setting to make the onboard video or PCIE slot the primary video device. This really shouldn't stop you from doing SLI though.

NaseebyWali · Dec 12, 2013

ahnilated :

Check this out. This is an image with the SLI bridge disconnected:
http://i.imgur.com/b2FSQA3.jpg?1

And this is the link with it connected:
http://i.imgur.com/o2u7zhG.jpg?1

I ordered another SLI bridge, and it is the one I am currently using because I thought the one that came with the motherboard might have been faulty. Turns out, it's the same situation with this SLI brdge as well.

NaseebyWali · Dec 12, 2013

ahnilated :

Sorry for such a late reply, but to answer this question: No, no primary cards are set with onboard configuration.

ahnilated · Dec 13, 2013

From what I am seeing, your second picture shows that you have SLI going.

NaseebyWali · Dec 13, 2013

ahnilated :

I do, but that is only with the SLI bridge disconnected. The other picture is in relation to when the bridge is connected.
It's strange, I know the SLI bridge is compatible with my cards as well, so I really can't point out the problem.

Could it be due to the fact that one card is an EVGA GeForce GTX 670 4GB while the other is an EVGA GeForce GTX 670 FTW 4GB? I mean, from what I know, its only a difference of the FTW card being slightly overclocked.

ahnilated · Dec 13, 2013

Normally for SLI you only have to have the same series of card IE 670. The ram on them don't seem to matter or the OC'd speed. The SLI setup will run at the lowest card's settings.

NaseebyWali · Dec 13, 2013

ahnilated :

True. But this issue doesn't allow me to enable SLI. Sure it is detected, but it still implies that I connect the SLI bridge to enable it. The option to "Maximize 3D Settings" is not active until the bridge is connected. But once connected, I can no longer see the option to configure SLI.

ahnilated · Dec 13, 2013

Lets try this... disconnect the SLI jumper, go into a game with something like fraps running. Get some average frame rates. Then go put the jumper on and go into a game and see if the frame rates improve. That way you will know if it is working in SLI or not. Make sure you are using a game that works with SLI.

NaseebyWali · Dec 13, 2013

ahnilated :

Seems like a viable plan my friend. I will look into it and update you soon. Thanks for your input by the way, I truly do appreciate it.

ahnilated · Dec 13, 2013

Make sure you have the latest Nvidia driver too incase you are running into some whacky bug in the driver.

Configure SLI Not Available

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