If you have a chance to upgrade that CPU, I can tell ya it will feel pretty great.
I had upgraded from a 2600K to a 1700X and the difference was insane. But then I also upgraded to a 3950X and the difference was still impressive, especially with how poor the original infinity fabric was. I can't imagine how awesome it would be to go from a 1700X to something like a 5700X/7700X or 12th/13th gen Intel.
Can't lie, I was actually interested in a GT1630 to use in a media server. I'm not sure of it's actual capability in terms of parallel encodes, but considering it supports HEVC and H264 decoding (even 4:4:4 12 bit), it would be perfect for transcoding media that isn't supported on certain devices. Plus the firmware unlock on Linux to allow it to transcode many streams. On a 1070, I think I was able to do 4 streams before it started to have issues, but it was more of an issue with Jellyfin than the hardware capability. It theoretically could transcode 1080p24 fast enough to do 10+ streams at once.
Replacing the bios battery is a good spot to start as well. It’s less common these days and more common in OEM systems, but sometimes they board won’t post with a dead battery.