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PCI Slot Posting

InoSiX
Level 7

‎09-19-2013 01:29 PM - last edited on ‎03-06-2024 07:35 PM by Community Admin

I have a pair of 780s (one ACX version, one SC version, but probably doesn't matter) that I am running in SLI. I have them in slot 1, and slot 3 (or the slot below the first black slot) but GPU post shows it as x16 (slot 1), and x8 (slot 3).

What am I doing wrong?
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15 REPLIES 15

ChiefZeke
Level 10

‎09-19-2013 01:33 PM

Try slot 1 and 4 - see 2.2.4 in manual.
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InoSiX
Level 7
In response to ChiefZeke

‎09-19-2013 01:41 PM

I apologize. I do have it in that slot. The slot above it is the black one I am refering to.
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InoSiX
Level 7
In response to InoSiX

‎09-19-2013 02:27 PM

Yeah it still reads 16x and 8x.
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InoSiX
Level 7

‎09-19-2013 03:27 PM

The bios lists them as x16 and x8. I'll need to confirm GPU-Z. The simulator shows the same lanes as 16x and 16x when used in that fashion.
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Chino
Level 15

‎09-19-2013 03:31 PM

Try reseating them. And if you have a can of compressed air, blow some into the PCIe lanes just to make sure that they're not dirty.
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InoSiX
Level 7
In response to Chino

‎09-19-2013 04:29 PM

Will give that a try tonite. Pain in the butt with the water cooling, but it must be dealt with! Thanks for the replies so far.
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Chino
Level 15

‎09-19-2013 04:37 PM

Well, for what it's worth, you're not losing any significant performance running x16/x8 instead of x16/x16. If it doesn't bother you, you can leave it be. I'm guessing you're custom watercooled. And I know how much of a hassle it can be to drain the loop and everything. 😛
Overclocking The Core i7-7700K With DIP5 |Overclocking the Strix GTX 1080 | OC Panel & OC Panel II Guide | Overclocking i7-6700K to 4.6GHz | R5E 128GB DDR4 Setup | Liquid Cooling GTX 980 Ti Poseidon | R5E M.2 FAQ
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InoSiX
Level 7
In response to Chino

‎09-19-2013 04:42 PM

I have quick disconnects between most of the loop, sans the SLI bridge which is solid and cannot be moved really. I'll need to move the cards together in pairs or drain just the video cards.
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