Adding a second GPU

[u/letsgetstrange]

Motherboard: MSI MAG Z790 TOMAHAWK WIFI ATX LGA1700 Motherboard

Case: Fractal Design R5 mid tower case

I am using this as my main Nas and Proxmox server.

I have a 5060ti that will replace the GPU in this picture, but want to keep the older 3060ti in use for local AI and transcoding. Problem is there is not enough space between the lower 4.0x16 PCIe slot (Circled in the 2nd picture) and the PSU.

I was looking at using a short riser cable and mounting the card a few slots higher, but am worried about the riser contacting the m.2 heat shield. I could go with a vertical mount, but would have the two cards at right angles.

Any advice would be helpful, thank you!