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GTX 580 SLI pci-e slot question

post #1 of 4
Thread Starter 
First of all, apologies in advance if the post is a bit confusing. I tried to make it was simple as possible. Maybe the picture will help

So right now I am running a GTX 580 on a Rampage 3 Extreme mobo.

Here is a picture for reference: http://www.ubergizmo.com/photos/2010...ge3extreme.jpg

1st PCI-e 16x slot: The mobo has a total of 4 pci-e 16x slots. The 580 currently sits on the highest slot. It doesn't cover any other slots due to the design of the mobo, the first slot is placed slightly higher than the rest so there is just enough room to fit a dual slot card without covering any other slots in between.

2nd PCI-e 16x slot: I currently have a Killer 2100 NIC.

3rd PCI-e 4x slot: Empty

4th PCI-e 16x slot: My GTX 460 Hawk is on this slot. The card covers the PCI 2.2 slot since it's a dual slot card.

5th PCI 2.2 slot: Empty (Covered)

6th PCI-e 16x slot: My Creative X-fi Champion sound card.


So I am planning on going SLI with the 580s some time in the future.

I want to arrange it so that my Sound card uses the 3rd slot.

While I will move my GTX 460 down to the 6th, and putting the second GTX 580 into the 4th slot.

Will I run into any issues if I do this? Is it more optimal for performance if I put the cards in SLI one on top of another or is it OK to skip slots. assuming the the SLI bridge will be long enough to reach from the 1st down to the 4th.

Thanks for the help!
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post #2 of 4
Not sure specifically about the motherboard, but you may need to go in the top PCIe x16, and then third PCIe x16 in order to run 16x16 SLI. Then you can put your 460 in the bottom slot and the NIC in whichever leaves the most space.

Or:

580
no slot
NIC
Soundcard
580
empty pci
460
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post #3 of 4
Lets make it simple, since you WAY over-think it.

From the 4 pcie-x16 slots they share it like this on the R3E:
1+4 - share.
2+3 - share.

The PCIx1 between the second and third slots, does not interfere with the shares.

The moment you put more than 2 cards in the PCIE slots, at least 2 of them turn to x8 instead of x16.
You plan to put 4 cards (2x580s, 1x460, 1xsourd card), which means all slots are at X8.
Doesn't matter where you put what.
Just put them where its most comfortable. There is no difference what so ever.

The two 580s next to each other at the top, than 460, than sound card.
That way, the last card won't interfere when the cables at the bottom where you connect the USB/HDD leds/start and reset buttons connectors for the case.
If you put the 580 or 460 at the bottom, they will sit on top of cables, which is uncomfortable.
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post #4 of 4
Thread Starter 
Hmm ok, thanks for your input
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Hard DriveHard DriveCoolingOS
Crucial MX100 512GB 2x WD SE 2TB (RAID-1) Corsair H100i Windows 7 Pro 
MonitorKeyboardCaseMouse
LG 29UM65-P IPS CMStorm Quickfire TK Red Corsai A540 White Proteus Core 
CPUMotherboardGraphicsRAM
Intel Core i5 2500k ASUS P8Z68-M Pro  EVGA GTX 680 SC+ 16GB Mushkin Enhanced Frostbyte 
Hard DriveOptical DriveCoolingOS
Crucial M4 128GB LG GH24LS50  Noctua C12P Windows 7 Pro 
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3x 27" Displays CMStorm Quickfire TK Brown Cyberpower CP1500AVRLCD Lian Li PC-V354B 
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