Slot Difference

[ahsun_ahmed]

Just wondering if placing my GPU in the second slot of my mother board will lower its performance because the stupid USB C cable is getting in the way of it, my motherboard is a X570nGigabyte Aorus Master

[Haro]

The second slot is x8 

Technically it's less lanes but th performance difference is very little

[Eigenvektor]

Depends on your motherboard. The second slot probably has fewer lanes. The performance difference is usually negligible.

[Sakkura]

Just now, Eigenvektor said:

Depends on your motherboard. The second slot probably has fewer lanes. The performance difference is usually negligible.

They have a newer version of that.

 

https://www.techpowerup.com/review/nvidia-geforce-rtx-2080-ti-pci-express-scaling/6.html

 

So basically you can lose maybe 3% performance with the strongest gaming graphics card currently on the market. It'll be less with weaker GPUs.

 

Also if you're worried about future GPU upgrades being held back by the slot, the PCIe 4.0 slot should prevent that (PCIe 4.0 x8 is just as fast as PCIe 3.0 x16, so once GPUs support PCIe 4.0 the slot will be as good as an x16 slot is today).

[Eigenvektor]

Just now, Sakkura said:

They have a newer version of that.

https://www.techpowerup.com/review/nvidia-geforce-rtx-2080-ti-pci-express-scaling/6.html

Yeah, I didn't want to spend a lot of time searching for it... got ninja'd in the meantime anyway :P There's also another one for PCIe 4.0:

https://www.techpowerup.com/review/pci-express-4-0-performance-scaling-radeon-rx-5700-xt/

 

I think the only card that has noticeable performance loss is the 5500 XT, because it is limited to 8 lanes and basically needs PCIe 4.0 to run properly.

https://www.tomshardware.com/news/amd-rx-5500-xt-vram-pcie-4

[ahsun_ahmed]

28 minutes ago, TofuHaroto said:

The second slot is x8 

Technically it's less lanes but th performance difference is very little

Isn't the second slot also x16 in PCIe 3.0 or do I just not understand

 

 

Saw this on gigabyte's product page

1 x PCI Express x16 slot, supporting PCIe 4.0 and running at x16 (PCIEX16)
1 x PCI Express x16 slot, supporting PCIe 4.0 and running at x8 (PCIEX8)

[Haro]

Just now, ahsun_ahmed said:

Isn't the second slot also x16 in PCIe 3.0 or do I just not understand

It is x16 size but it has half the pin count 

A x16 full lane slot has 168 pins