[SOLVED] pcie 4 x4 vs pcie 3 x16

[crazypicklerick]

my pc has a free pci 4.0 4x slot
can i add a secondary pcie 3.0 x16 Gpu
by using adapter and riser and not bottleneck it

p.s. i know pcie is 4.0 is 2x faster

also what card at max i could stick it with

 

[kanewolf]

A PCIe 4.0 slot with a 3.0 card will run at 3.0 speed. So you are running a 3.0 x4 interface for that card. So it isn't 2X faster because the card slows it down.