I have just started using my UNRAID server for watching movies, however the server goes to 100% CPU and the video is jittery. The CPU is quite old, an i7-4771 in an ASRock Z87 Pro4 motherboard. I do have an old AMD Radeon R9 380 lying around. Could I put that in the server and get Jellyfin to use it? Would it improve performance? If not, can you suggest a budget graphics card that would do the job?