SLI wont see my second GPU

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Pandamonia

Senior member
Jun 13, 2013
433
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OK So my problems continue.

I have a problem with my SLI. The nvidia drivers wont find my second 780 Lightning.

I am mixing Lightning and Lightning LE cards but they are the same spec just different clocks. But the Nvidia driver just wont see the second card.

GPUZ see's both cards

Any ideas?
 
Stuka87

Stuka87

Diamond Member
Dec 10, 2010
6,240
2,559
136
Pandamonia said:
Yes both are in x16 PCI 3 slots.

I had SLI working yesterday. But Not now...
Click to expand...

Not that its your problem, but you do not have both cards running at 16x. They are full length slots, but slow to 8x when running two GPU's.
 
S

Sohaltang

Senior member
Apr 13, 2013
854
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swchoi89 said:
Did you actually enable it? I don't think it's automatically configured (at least that's what happened to my GTX 770 SLi).
Click to expand...


You have to go into 3D setting in nvidia control panel. Are you seeing them both in gpuz? Also I had kinda the same problem. I pulled both cards out and installed one. Then rebooted and installed the other.
 
R

rgallant

Golden Member
Apr 14, 2007
1,361
11
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cmdrdredd said:
My motherboard did that stuff too. It wasn't the cards at all.
Click to expand...
same here to many new hardware found -580sli to 780 sli needed 3 cold reboots.
take note of how many nv hdmi sound devices you have now [x8]
and nuking them in device manager is the best practice.
 
FalseChristian

FalseChristian

Diamond Member
Jan 7, 2002
3,322
0
71
I don't know how many times I had to switch the cards around and then everything was fine.

Let this be a lesson to everyone: try the simple things 1st.
 
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