GTX 660 Ti SLI Setup Help

[NightFoxXIII]

To start off with I'm new the the PC scene and I just got a second GTX 660 Ti to try to SLI my setup but have found that when I try to configure the NVIDIA settings, there's no such option for configuring SLI. I tried uninstalling and reinstalling the drivers and used a 'Driver Sweep' to get rid of any extras and tried to install clean but to no avail.

It detects both cards and I can offset for example PhysX to the second video card. What I have trouble now is recognizing these as SLI. Any and all help would be very much be appreciated.


SPECS:
Asus P8Z77-V LE PLUS (mobo)
Intel i5-3570K Processor
Antec Gaming 900W PSU
1 EVGA GeForce GTX 660 Ti SC (with 3GB memory) - in primary PCIe 3.0 slot
1 EVGA GeForce GTX 660 Ti SC (with 2GB memory) - in secondary PCIe 3.0 slot
Graphite Series 600T Mid Tower, Special White Edition
Vengeance 8GB DDR3 1600MHz CL9 Dual Channel Kit (2 x 4GB), Cerulean Blue

 

[lt_dan_zsu]

Check if your motherboard can do sli.

 

[knoe]

Just a quick question...was the SLI bridge installed on the cards?

 

[lt_dan_zsu]

^Even if there wasn't one, I think it would still detect that sli is available.

 

[NightFoxXIII]

@lt_dan_zsu : Yes it supports SLI/Crossfire

@ Knoe : Yes the SLI bridge is installed on the gold connectors.

My problem is that everything has been set up, and it detects the cards just fine. It's just that there's no recognition for SLI so I don't know what's wrong and why. Also I've reinstalled the drivers several times.

 

[Mousemonkey]

This could be one of those cases where a 2GB card will not SLi with a 3GB card.

 

[NightFoxXIII]

Really? Even if they're the same exact GPU with a difference in memory? I thought that with SLI, you only had to worry about using the same GPU. Not much else. You could even mix vendors if you wanted to.

 

[Mousemonkey]

Really? Even if they're the same exact GPU with a difference in memory?

It's not the first time this would have happened, the GTX7800 512MB and GTX7800 1GB from XFX was one and there have been others.

 

[NightFoxXIII]

Best answer selected by NightFoxXIII.