mstrxploder
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Hi everyone i just purchased another 780 ti classified to sli and when i installed the second card and installed the sli bridge no sli option was available on the nvidia control panel.
I tried reinstalling windows and changed power cables too.
i am thinking its my psu its a corsair ax860
here are my specs
i7 4770k
asus maximus vi formula
corsair h100i
corsair ax860 psu
2x evga 780 ti classified
2x samsung evo ssd 500gb
seagate 1tb hdd
asus bluray player
3x 140mm fans
4x 120 mm fans
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Azzazel99
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Re: no sli option
2014/04/24 11:29:00
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Sounds like a bad sli bridge maybe? Is the control panel seeing the 2 cards just not offering the sli ootiin?
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mstrxploder
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Re: no sli option
2014/04/24 11:30:30
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Yeah it even shows in the device manager
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Sajin
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Re: no sli option
2014/04/24 11:37:05
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Both cards must be running at least x8 for the SLI option to be shown inside the NVCP. If one card is running in x4 mode the SLI option will not appear inside the NVCP.
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mstrxploder
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Re: no sli option
2014/04/24 11:42:10
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i checked the mobo manual and the top to pcie slots run at 8x do i have to enable this in the bios maybe?
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EVGATech_JaesonW
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Re: no sli option
2014/04/24 11:52:56
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Make sure that you have the cards in slots 1 and 2. It looks like slot 3 may be a 4x slot and won't support SLI. Also, if you have another PCIe card like a sound card or some kind of expansion card in that third PCIe slot, it will force the PCIe slots to an 8x/4x/4x configuration, knocking out the ability to run SLI.
If the cards are having trouble in slots 1 and 2, try testing the new card on it's own in slot 1 to make sure it's working properly, and if so try testing either card on it's own in slot 2 to confirm the PCIe slot is working. Most likely it's going to be a faulty card or faulty PCIe slot, and this will tell us which one it is.
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mstrxploder
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Re: no sli option
2014/04/24 12:06:08
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oh make sense i have a soundblaster sound card on the bottom pcie slot i will take that off when i get home thanks a bunch everyone i will keep you posted
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mstrxploder
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Re: no sli option
2014/04/24 12:25:42
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so by having my sound card plugged into the bottom pcie slot it makes my current card run at 8x?
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Sajin
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Re: no sli option
2014/04/24 12:33:17
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With all three PCI-E slots populated your config will run at x8/x4/x4, this is what is causing the SLI option to not appear, by removing the sound card it will change slots 1 & 2 to x8/x8 and you will then be able to enable SLI.
Your motherboard states: x16 (with one device) x8/x8 (with two devices) or x8/x4/x4 (three devices.)
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mstrxploder
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Re: no sli option
2014/04/24 12:43:12
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Sajin
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Re: no sli option
2014/04/24 12:56:01
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No problem. 
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mstrxploder
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Re: no sli option
2014/04/24 12:59:06
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should i think of upgrading my psu? to something with more power?
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tommyk2005
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Re: no sli option
2014/04/24 13:44:00
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If you are not having any issues, I would not upgrade that psu.
Core i7 2600k 4.7Ghz Asus P8P67 Deluxe eVGA 780 ti Superclock SLI 1150/7516 G.SKILL Ripjaws X 2x8GB 2133 ASUS Xonar Phoebus beyerdynamic DT 880 Pro Corsair AX 1200 Western Digital 1TB, Western Digital 2TB, Seagate 1.5TB, Seagate Free Agent 4TB Samsung 840 EVO 500GB Qnix QX2710LED 100hz Coolermaster HAF 922 Windows 7 64
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EVGATech_JaesonW
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Re: no sli option
2014/04/24 14:16:10
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I had a sneaking suspicion you may have had a third PCIe card. Let us know how it goes without the sound card in, but that ought to fix you right up.
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Sajin
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Re: no sli option
2014/04/24 14:39:41
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mstrxploder
should i think of upgrading my psu? to something with more power?
Yes. Why? PSU aging. 1000W would be a good choice.
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mstrxploder
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Re: no sli option
2014/04/24 15:19:49
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it worked moved the sound card to a pci slot and sli is enabled thank you all very much
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