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Does it matter what PCIex16 slot my GPU is in?

Vipermk2

I have a rampage Edition 10 with a Noctua D14 cooler which interferes slightly with the Graphics card. Aesthetically I would prefere the graphics card being in a lower slot.

 

 

Would I be right in assuming that I can put the card in any PCIe x16x8 slot, namely slot 3 in the image below? Baring in mind that running a M.2 drive in slot 4 and that I'm on a 40 lane CPU.

 

 

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I think Gamers Nexus had to use second 16x slot because of the cooler in a video they did about Noctua Threadripper cooler.

 

I would assume it would be ok in your case too.

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Not really. Aslong as the GPU is getting 8 lanes it should be fine. I have my GPU 2 slots lower than it should be and it runs in 8x mode but it's fine.i would however make sure it's connected directly to the CPU and not running off the chipset. My board has a 16x slot that runs of the chipset but it tops out at 4x speed. Just check your motherboard manual to see what slot to use.

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TxLZF2l.png

 

If I interpret this correctly, it's probably not going to work. I don't know if all motherboards do this, but I know mine requires that the first PCIe 3.0 x16 slot is used if I'm only installing one card. I get a boot failure if it's in any other slot.

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1 minute ago, typographie said:

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I was going to address the same issue, for some reason some boards seem to only accept it when the first (the one above) slot is used when handling a single video card...

Personal Desktop":

CPU: Intel Core i7 10700K @5ghz |~| Cooling: bq! Dark Rock Pro 4 |~| MOBO: Gigabyte Z490UD ATX|~| RAM: 16gb DDR4 3333mhzCL16 G.Skill Trident Z |~| GPU: RX 6900XT Sapphire Nitro+ |~| PSU: Corsair TX650M 80Plus Gold |~| Boot:  SSD WD Green M.2 2280 240GB |~| Storage: 1x3TB HDD 7200rpm Seagate Barracuda + SanDisk Ultra 3D 1TB |~| Case: Fractal Design Meshify C Mini |~| Display: Toshiba UL7A 4K/60hz |~| OS: Windows 10 Pro.

Luna, the temporary Desktop:

CPU: AMD R9 7950XT  |~| Cooling: bq! Dark Rock 4 Pro |~| MOBO: Gigabyte Aorus Master |~| RAM: 32G Kingston HyperX |~| GPU: AMD Radeon RX 7900XTX (Reference) |~| PSU: Corsair HX1000 80+ Platinum |~| Windows Boot Drive: 2x 512GB (1TB total) Plextor SATA SSD (RAID0 volume) |~| Linux Boot Drive: 500GB Kingston A2000 |~| Storage: 4TB WD Black HDD |~| Case: Cooler Master Silencio S600 |~| Display 1 (leftmost): Eizo (unknown model) 1920x1080 IPS @ 60Hz|~| Display 2 (center): BenQ ZOWIE XL2540 1920x1080 TN @ 240Hz |~| Display 3 (rightmost): Wacom Cintiq Pro 24 3840x2160 IPS @ 60Hz 10-bit |~| OS: Windows 10 Pro (games / art) + Linux (distro: NixOS; programming and daily driver)
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I came on here to save me doing the actual tests but I've just run some benchmarks on the  1st Slot (PCIe x16x8) and the 2nd Slot  (PCIe x8) and both Fire Strike Ultra and Rise of The Tomb Raider show exactly the same results, well as close as they can be. The Strange thing is, although the MB manual says that the 2nd slot is a PCIe x8. GPU-Z identifies it as a PCIe x 16. Actually both slots are indentified as exactly the same.

 

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