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sli option gone

davegt3

davegt3

davegt3

Associate
Joined
30 Dec 2010
Posts
173
hi i have just installed my second gtx670 along with water cooling etc. but the option to activate sli is not in the nvidia control panel?? im using windows 8.1
 
Did you try it before water cooling? Have you put the SLI bridge on correctly? Have you made sure all the power connectors are plugged in? Have you tried reseating the card?
 
Have you tried reloading the drivers.

Is the SLI bridge in place.

Is the second card PSU connectors in place.

Is the PCI-E slot turned on, on the mobo if applicable.

If none of the above could you post your full system specs so the guys can help.
 
[Display]
Operating System: Windows 8.1 Pro with Media Center, 64-bit
DirectX version: 11.0
GPU processor: GeForce GTX 670
Driver version: 340.52
Direct3D API version: 11.1
Direct3D feature level: 11_0
CUDA Cores: 1344
Core clock: 1006 MHz
Memory data rate: 6008 MHz
Memory interface: 256-bit
Memory bandwidth: 192.26 GB/s
Total available graphics memory: 4096 MB
Dedicated video memory: 2048 MB GDDR5
System video memory: 0 MB
Shared system memory: 2048 MB
Video BIOS version: 80.04.19.00.30
IRQ: 16
Bus: PCI Express x8 Gen2
Device ID: 10DE 1189 097A10DE
Part Number: 2004 0005
GPU processor: GeForce GTX 670
Driver version: 340.52
Direct3D API version: 11.1
Direct3D feature level: 11_0
CUDA Cores: 1344
Core clock: 1006 MHz
Memory data rate: 6008 MHz
Memory interface: 256-bit
Memory bandwidth: 192.26 GB/s
Total available graphics memory: 4096 MB
Dedicated video memory: 2048 MB GDDR5
System video memory: 0 MB
Shared system memory: 2048 MB
Video BIOS version: 80.04.19.00.30
IRQ: 17
Bus: PCI Express x8 Gen2
Device ID: 10DE 1189 097A10DE
Part Number: 2004 0005
 
Download GPU-Z and check the speed the PCI-E slots are running at.

Select each card in turn in the bottom left hand corner and then click on the question mark next to "Bus Interface" to show the full speed.

Both slots need to be running at 8x for SLI to work.
 
d5df8fc3f713a7c3252d5f92615c827c.jpg


Do you not get that option where the black arrow is pointing?
 
Try reinstalling drivers. Seems strange that NCP is showing you have 2 cards connected but can't choose between SLI and normal. You could also try a BIOS update on your motherboard (unless it was working prior to water cooling.
 
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