How to connect a second video card if there is not enough space?

Question

Iron

There are two video cards, the motherboard supports the connection of two video cards (there are two PCI-E x16 slots) and even if you want, you can shove them in and everything will work (I already tried it), but then there is a cooling problem - the efficiency of coolers in such a sandwich drops by 70 percent Accordingly ,

the question arises - is it possible to somehow connect one of the video cards from the outside? I know that there are cases with connection via thunderbolt, but this option does not suit me, because. connection becomes slow. Maybe there are some cases with connection via PCI-E? Something like a PCI-E extension cable? I couldn't google, maybe I just don't know the keywords. I saw extension cables for PCI-E, but they are all short. Is it a physical limitation? Extension cable cannot be made longer due to high speeds?

In order not to have a hate about mining, I will add that I am writing a voxel engine on a volcano and rays, a second video card is needed to test the rays on a video card without RTX support. Video cards are: RTX 3080Ti and GTX 1080.

Answer 1

There are flexible adapters .

PCI-E x16 (Male) to PCI-E x16 (Female), EPCIEM-PCIEFX16

Answer 2

put the 2nd video card in PCI-E x4....
or use the correct video cards for such assemblies, with turbine cooling
"there is (Tajik accent)...."
There are extension cords, but usually not very long. They are called riser (riser)
https://market.yandex.ru/offer/zFqU-ZpQ-iO9DgBDkKC...
https://www.google.com/search?q=riser+pci-e+3.0+x1. ..

Answer 3

If it really bakes to stick two, then you need a more sane case

Answer 4

buy a riser, they are not very expensive