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2 Way SLI Slot Position Question

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Eisenhorne
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Thursday, March 10, 2011 3:00 PM (permalink)
I have been unable to get two 480 GTX cards to work in PCIe slots 2 and 5.  Please see the attached image (sorry cant crop pic correctly).  The PCIe slots are numbered from top to bottom 1, 2, 3, 4, 5, 6.
 
Currently, I can get SLI to work with the two 480 GTX's in PCIe slots 3 and 5.  Due to wanting to add heat sinks and fans I want to get some space between the cards and want them to be in slots 2 and 5.  I can only get video successfully in the 3, 5 positions.  I know I must be missing something but it doesnt make sense to me.
 
If I put one card in Slot 2, I get a rapid beep which sounds like a long beep followed by a short beep.  If I run a single GTX 480, the card only works if in slot 3.
 
I'm a bit lost with this and only want to spend more money on third party heat sinks and fans as the cards run REALLY HOT.
 
EVGA Classified 3 Way Sli (Latest Bios as of Mar this year 2011)
2x 480 GTX (Latest drivers)
SSD
12 GB RAM
USB 3.0 add-in card in PCI3 Slot 1
 
Thanks for the help.

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    linuxrouter
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    Re:2 Way SLI Slot Position Question Thursday, March 10, 2011 3:07 PM (permalink)
    Check to make sure that PCI-E slot 2 is enabled via the board. The PCI-E disable jumpers are next to the IDE slot.

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    Eisenhorne
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    Re:2 Way SLI Slot Position Question Thursday, March 10, 2011 3:48 PM (permalink)
    All the jumpers are in the default position being on the furthest most left covering 2 pins.  I believe this to be enabled.
    post edited by Eisenhorne - Thursday, March 10, 2011 3:51 PM
    #3
    KMoore4318
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    Re:2 Way SLI Slot Position Question Thursday, March 10, 2011 4:57 PM (permalink)
    Even if they are in the correct position, you may want to remove and reinstall the one in question, , as two deferent metals can oxidize especially if they were ever exposed to moisture. Oxidation, can prevent contact.
    post edited by KMoore4318 - Thursday, March 10, 2011 5:13 PM

      
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    Eisenhorne
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    Re:2 Way SLI Slot Position Question Thursday, March 10, 2011 5:11 PM (permalink)
    Gotcha, will try.
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    Bkatt
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    Re:2 Way SLI Slot Position Question Thursday, March 10, 2011 5:58 PM (permalink)
    Try one card is slot two. If it does not boot, than make sure it works on slot one.
    \
    I know with older board the video card needed to be in slot one to work however i thought that was no the case with this board.

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    Eisenhorne
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    Re:2 Way SLI Slot Position Question Thursday, March 10, 2011 10:05 PM (permalink)
    Ok I reseated the "Disable PCIe" jumpers.  Tried the cards in numerous different slots, single and double.  Cannot get video with both cards in positions 2 and 5.  For some crazy reason they will only work in positions 3 and 5.  What should I try next?
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    linuxrouter
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    Re:2 Way SLI Slot Position Question Friday, March 11, 2011 0:09 PM (permalink)
    Beyond the PCI-E jumpers, there is not really anything else that you need to do to get slot 2 to work. As long as the slot is enabled, it should work. I have a GPU in slot 2 with my Classified board and did not do anything special to get this slot to work. Unfortunately, this could be a board related issue.
     
    Edit: Come to think of it, one other thing you might try is to check under the board for a short somewhere.
    post edited by linuxrouter - Friday, March 11, 2011 0:13 PM

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