Help with sli not being detected without custom driver

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Noobsside

Reputable
May 23, 2014
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4,520
Fatal1ty Z68 Professional
1000w ocz 80+ psu
3tb data drive 7200rpm
Corsair force 3 128gb ssd for os and a few games
2x 680 lightnings
I7 2600k @5 ghz
16gb ram
Windows 7 latest sp
Latest nvidia driver

So I have had this setup for a while but it took me ages to get it to work in the first place eventually using a driver that let me use two diffrent cards in sli together as for se reason my pc sees these cards as seperate I believe they show up in device manager as two 680s and in nvidia controll Panel but I do not get the option to enable sli unless I use the small program I have to allow seperate gpus to work together

It's annoying as it takes a while to update seperatly after every driver release

Ther cards are both the same bios version etc memory (both 2gb) and that all the same even the same batch of cards

Motherboard supports sli

Sli cable is in

And the sli will work with this programme I have but won't get recognised by nvidia what am I doing wrong?
 
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I

i7Baby

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Jul 25, 2012
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Post your complete build and OS - per forum guidelines.

Cards in pcie slots and locked in? Cards have both power supply connectors attached and working? Powers supply suits 2 x 680's? SLI bridge attached?

Two cards show up i Control Panel, Device Manager? Both have latest drivers? Old drivers uninstalled? Using nVidia Control Panel? SLI set in nVidia Control Panel?

Cards overclocked?
 
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N

Noobsside

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May 23, 2014
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Both cards are 2gb I have 1000w psu so no problem there both cards plugged in with the bridge connected and tried with two seperate bridges that I know work
Latest drivers for cards onto a clean windows install

Cards are not overclocked
And have tested each on there own are both working cards

And both show up in controll panel and device manager and nvidia controll center just won't let me enable the sli
 
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Noobsside

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May 23, 2014
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I've checked it all out all seems ok according to info on that site I've got a theory or two but they seem like conspiracy theory's

Firstly the cards where brought from separate places one is a uk vendor that does a lot of grey imports on PC parts as it's cheaper than uk prices just wondering if there's subtle differences between uk card and us card I can't detect that's stopping the second one from being detected properly

Or that the bios these cards use isn't like by nvidia as it has triple unlocked voltages allowing you to significantly oc them if you've got the cooling making you not need a new card for a long time

I know msi where forced to stop releasing that bios
 
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i7Baby

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Jul 25, 2012
44,084
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106,960
Similar problem reported - http://www.overclock.net/t/1333709/msi-gtx-680-lightning-sli-issue

"This is kind of late now, but I have figured it out. First I put in my old video cards and installed them with their latest drivers and everything. Then I uninstalled them but used Device Manager to uninstall them, then shut the PC off. Put in the 680's and waited to see both of them show up.........AND THEY DID! Installed the latest drivers and now I have 2 MSI GTX 680 LIGHTNING's! So I managed to fix my problem w/out having to re-install Windows 7 or w/out having to get the cards replaced."
 
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