PC Nerds: Advice on an Entry-level Graphics Card for Win10 with Occasional Video Editing

[oj88]

I have a fairly old PC that's around 9 years old (these damn Gigabyte boards won't die). It's an EP45-UD3R with a Core2 Quad Q9550 CPU and 6GB of DDR2 RAM. It is mated to an ATI Radeon HD 4800 series video card.

It is a general-purpose PC that me and my family uses at home. I have, since a few years ago, upgraded to SSD and the overall performance, at least on OS and application load times and such, are on par with modern PCs. We don't play games (well, I used to during this PC's heyday but that's no longer my thing).

Anyway, I want to replace the graphics card. Reason being, the HD 4800 is technically no longer supported by Windows 10. It still works but you can tell that it's not optimized and the graphics starts to lag even with just playing around with the Windows 10 UI. It also won't play 2K and up HD videos in Youtube. Even 1080P videos can be jittery at times and you can see that it's dropping frames.

Question is, given that it is an old PC, what entry-level video card would be ideal so as to be able to optimize the Windows 10 user experience? I should mention that I also occasionally use this PC to render videos in Sony Vegas Pro 15 (up from Vegas Pro 8 when this was new). Otherwise, it doesn't get much of a workout to justify a more powerful video card nor is it a compelling reason to upgrade the whole thing.