I have a 4070 plugged into an intel haswell era (2013?) as my personal desktop machine. it runs most midrange games pretty ok, although helldivers 2 (AAA title) is a bit of a dog even at low resolutions. For personal desktop tasks I haven't had much need to upgrade past that. Probably just about ready to buy a new motherboard/cpu combo for it for another dozen years or so.
Pretty sure most has well boards come with UEFI. At least my ivy ridge Z77 board at the time did. God, those were the days, one could buy a proper motherboard for like 80$.
They did use UEFI back then, but the BIOS CSM was on by default so it was pretty easy to accidentally end up taking the legacy boot path.
The main one, and the one I'm using now, has a Radeon Pro WX 5100 which is a Polaris card from about 8 years ago.