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SLI not working

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Hi guys!

 

Today I bought a second 8800GT 512mb. It's a XFX Alpha Dog. I already own a BFG 8800GT OC 512mb.

 

Cards are clocked differently but the bfg card should clock down to match the xfx's clock, or so I have read.

 

So, I did everything. Windows did not recognize the second card. I tried different configs (bfg on top, xfx on top), different driver versions (from the manufacturer, beta drives, official drivers), switched ram slots, cleared cmos about ten times and that #@$#@ SLI balloon would not show up. Windows did not recognize the second card in device manager either.

 

Tried both cards in single mode and both worked fine. Even tested it in game.

 

Anything I should try before getting rid of this board? :sad:

 

Thx for the help

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Hello,

 

Is it always the 2nd card that doesn't work when both are in?

Combinations to try.

 

1st card slot 1 pcie power 1

2nd card slot 2 pcie power 2

 

1st card slot 1 pcie power 2

2nd card slot 2 pcie power 1

 

1st card slot 2 pcie power 1

2nd card slot 1 pcie power 2

 

1st card slot 2 pcie power 2

2nd card slot 1 pcie power 1

 

And are you using the right modular plug configuration?

http://www.pcper.com/article.php?aid=327&type=expert&pid=3

 

Also while doing the above remove and unplug everything that is not required.

Remove the nvidia drivers and use the latest ones from their website.

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Have you jumpered the blocks between the PCI-e x16 slots the x8-x8 configuration for SLI?

 

Have you tried a single card in the lower PCI-e slot?

 

Did you have the SLI bridge connected when trying to run them in SLI?

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@sharp

I did try swapping cards up and down but did not pay much attention to the cables. Will try.

 

@radodrill

Yes, did all thatt.

 

Thx for the help guys.

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So what were the results?

Always the same card not working?

 

If the new card goes in first (top slot) you said that it works fine on its own.

If you then turn off and insert the old card in the bottom slot what happens?

Old card not work in device manager?

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So it is always the card in the bottom PCI-E slot that does not work?

 

Have you also tried just 1 gfx card in the bottom slot on its own?

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It's always the second card guys, no matter which one. Both work perfectly in single mode in the first slot and the second slot.

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Have you set your jumpers on your motherboard?

Have you made sure your power connectors are all connected?

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