GTX 780 SLI option doesnt show in nvidia control panel

Domoxiii · Sep 5, 2014

I recently bought another gtx 780 for my pc to run in SLI but atm its not working
I have GTX 780 ACX SC + GTX 780 SC no ACX
they both have same speeds and things the only difference is the cooler addition
i have them installed right now and both do work, my computers reads both 780 cards and i have the SLI bridge connected. The SLI option still doesnt appear on the control panel. My mother board is the maximus Formula V and it supports duo graphics. My Powersupply is 1000w. so im not sure what the problem is any info would be greatly appreciated.

TopLuca · Sep 5, 2014

I think in Nvidia's side you need the exact same cards to SLI .

TopLuca · Sep 5, 2014

Or Actually I'm wrong .

i7Baby · Sep 5, 2014

Make sure they're locked into their pcie slots on a sli compatible mobo and that the sli bridge is connected properly.

Then set sli up in nVidia Control Panel - enable 3D

TopLuca · Sep 5, 2014

i7Baby :

The motherboard is sli compatible , Maybe it has only two pcie that you can SLI onto .

Domoxiii · Sep 5, 2014

Ive tried it but to no avail

TopLuca · Sep 5, 2014

Domoxiii :

What PCIe slots are you using for the SLI , try and make them the two nearest to the CPU.

i7Baby · Sep 5, 2014

http://www.asus.com/ROG_ROG/MAXIMUS_V_FORMULA/specifications/ says "3 x PCIe 3.0/2.0 x16 (x16 or dual x8 or x8/x4/x4) "

So slot 1 and 2 would get x8 each. So should be fine.

TopLuca · Sep 5, 2014

i7Baby :

That's what I thought , thats why I recommended the slot 1,2 .

Domoxiii · Sep 5, 2014

Ive tried puting the graphics card in different slots when i put them in the ones closest to my CPU the one in the 2nd slot wont read and it only shows as the one graphics card

TopLuca · Sep 5, 2014

What kind of PSU do you have ?

i7Baby · Sep 5, 2014

You haven't put the sli bridge on properly. Push hard.

Domoxiii · Sep 5, 2014

My PSU is Seasonic 1000w platinum
and the sli bridge is all in.
what do i do?

TopLuca · Sep 5, 2014

Are both of them the 3gb version ?

i7Baby · Sep 5, 2014

Try another bridge.

Domoxiii · Sep 5, 2014

yes both are 3gb version
when i try the other bridge would i need to restart my PC or just pull it out and test the other bridge?

i7Baby · Sep 5, 2014

I hope you don't do anything while powered up.

Damn_Rookie · Sep 5, 2014

Domoxiii :

If the card isn't recognized at all when in the second slot, that suggests the screenshots you've supplied are with the cards in the first and third x16 slots, right?

If they are in the first and third slot, that would certainly explain why you can't activate SLI; according to the manual, the third x16 slot runs at x4 mode at most (regardless of what other x16 slots are occupied), and per nVidia's official rules, you need a minimum of x8 lanes per graphics card for SLI.

i7Baby · Sep 5, 2014

I'm not sure if Rookie is 100% right, but I'd be putting them in the x8 and x8 slots anyway.

If slot 2 doesn't work, then try cleaning it and try again.

Domoxiii · Sep 5, 2014

So when i install the card into the 2nd slot would i need to unistall my previous graphics card driver?
do i need to remove both cards too then reinstall them?

i7Baby · Sep 5, 2014

No - just move the card.

GTX 780 SLI option doesnt show in nvidia control panel

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