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GPU Slot Matters?

Mavericknese

Right now my GPU is in the secondary x16 PCI EXPRESS slot (my motherboard has three).

Will my performance be affected or it doesn't matter at all?

Case: Corsair Carbide SPEC-OMEGA Black/Red

PSU: Corsair TX750M

Motherboard: ASUS ROG STRIX X299-E GAMING

CPU: Intel I7-7740X

CPU Water Cooler: Corsair H80i v2

GPU: ASUS DUAL-O8G GeForce GTX 1070

RAM: 1x Kingston HyperX FURY 8GB 2666Mhz DDR4

HDD: Seagate SATA 3,5" BarraCuda 1TB

SSD: Kingston 2.5" 240GB A400

 

 

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AFAIK it's only the bottom slot that'll have less pcie lanes. Only thing I can think that would lower performance would be the smaller amount of space for airllow

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Usually only top slot has x16. Second one x8 and third uses the chipset x4.

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Won’t matter unless your card can saturate 16x bandwidth. Which is doubtful but you can always test. 

Main RIg Corsair Air 540, I7 9900k, ASUS ROG Maximus XI Hero, G.Skill Ripjaws 3600 32GB, 3090FE, EVGA 1000G5, Acer Nitro XZ3 2560 x 1440@240hz 

 

Spare RIg Lian Li O11 AIR MINI, I7 4790K, Asus Maximus VI Extreme, G.Skill Ares 2400 32Gb, EVGA 1080ti, 1080sc 1070sc & 1060 SSC, EVGA 850GA, Acer KG251Q 1920x1080@240hz

 

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1 hour ago, thinwalrus said:

Usually only top slot has x16. Second one x8 and third uses the chipset x4.

most motherboards, yes the first x16 slot will be PCIe 3.0x16. (my first slot happens to be a x1 slot .. starting to gain popularity as the air coolers get bigger and interfere with the first slot)

 

OP's motherboard has 3- pcie 3.0x16 slots, so any slot will work without degrading performance aside from cooling.

                                             ~~~~Started Folding - Feb 7, 2019~~~~

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Taken from my motherboard's manual. Right now my GPU is in the 4, as i think it only matters if it is PCIEX16/X8, i'm just thinking about moving to 1 just to get closer to CPU/Memory/Motherboard, and raising the 2 front coolers a bit for better airflow as Monjes said.

1 hour ago, monjessenstein said:

AFAIK it's only the bottom slot that'll have less pcie lanes. Only thing I can think that would lower performance would be the smaller amount of space for airllow

 

Motherboard PCIe Placement.png

 

Motherboard PCIe Placement 2.png

Case: Corsair Carbide SPEC-OMEGA Black/Red

PSU: Corsair TX750M

Motherboard: ASUS ROG STRIX X299-E GAMING

CPU: Intel I7-7740X

CPU Water Cooler: Corsair H80i v2

GPU: ASUS DUAL-O8G GeForce GTX 1070

RAM: 1x Kingston HyperX FURY 8GB 2666Mhz DDR4

HDD: Seagate SATA 3,5" BarraCuda 1TB

SSD: Kingston 2.5" 240GB A400

 

 

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1 hour ago, GeoSquigg said:

most motherboards, yes the first x16 slot will be PCIe 3.0x16. (my first slot happens to be a x1 slot .. starting to gain popularity as the air coolers get bigger and interfere with the first slot)

 

OP's motherboard has 3- pcie 3.0x16 slots, so any slot will work without degrading performance aside from cooling.

I was talking about how the x16 length slots are wired.

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3 minutes ago, thinwalrus said:

I was talking about how the x16 length slots are wired.

Trying to make it clear for OP (and future lurkers)

 

And now just to clarify, not all x16 length slots are wired for 3.0x16 speeds.

For example my mobo has 3 x16 length slots that are wired to run at (top to bottom) 3.0 x 16, x4, x1 speeds

                                             ~~~~Started Folding - Feb 7, 2019~~~~

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1 minute ago, GeoSquigg said:

Trying to make it clear for OP (and future lurkers)

 

And now just to clarify, not all x16 length slots are wired for 3.0x16 speeds.

For example my mobo has 3 x16 length slots that are wired to run at (top to bottom) 3.0 x 16, x4, x1 speeds

Yeap I messed up a bit and made it confusing. Apparently I am strongly opinionated on that 7740X is no HEDT part.

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