Rx 6600xt pci-e 3.0 x4 vs pci-e 3.0x8

Alanschbeider · January 22, 2022

Hi, i don't speak English very well so i Will try My Best.

I have a 5600xt working on pci-e 3.0 x8

And a 6600xt on pci-e 3.0 x4.

SO i want to know how much performance

Can i gain if i swap gpus so the 6600xt work at pci-e 3.0x8 and how mucho if i change to pci-e 4.0 x4 or x8.

Thanks to everyone.

Mb Asus rog strix b450 gaming f.

Ryzen 5 5600xt

16 gb 3000mhz

Gpu 1 rx 5600xt pci-e 3.0x8

Gpu 2 rx 6600xt pci-e 3.0 x4

Chris Pratt · January 22, 2022

A lot. The 6600 XT is PCIe 4.0x8 (8 of the 16 pins aren't wired up). Even at PCIe 3.0x8, you only have access to half the bandwidth of the card. The full bandwidth may not be necessary in all cases, but there are times when that's definitely going to hurt performance. At PCIe 3.0x4, you're now talking 1/4 of the card's bandwidth, which is very much going to hamstring its performance.