You might want to consider an NVIDIA GeForce GT 1030 card instead. These have relatively low power requirements, support the use of 2 monitors and have the ability to decode VP9 and HEVC.
There are passively cooled options if there is room for them and you think air circulation in that part of the case is good enough:
https://www.gigabyte.com/Graphics-Card/GV-N1030SL-2GL#kf
https://www.evga.com/products/product.aspx?pn=02G-P4-6332-KR
https://www.msi.com/Graphics-card/GeForce-GT-1030-2GH-LP-OC.html