FIXED: I reset windows in the settings and then reinstalled drivers and downloaded dxsetup from Microsoft.
Had a bit of a search beforehand but none solved my issue.
Played on dx11at launch no issues, then
Played on dx12 when it left the beta, again no issues.
Game ran at 100+fps at 1440p.
Probably played for like 50 hours in total without major issues.
Whilst NOT playing a game or doing anything, computer crashed and got hung on windows, so i ended up just reinstalling windows as its on its own drive. Downloaded my graphics driver, etc, loaded up steam and all my games work fine (pubg, half life, etc)
Then i downloaded epic games and did the install trick to avoid re-downloading 70gb of bl3, crashed at start with dx12, though dx11 is fine. So i deleted the game and re-downloaded bl3 (also tried verfiy multiple times) and same results.
I have learned that dx12 comes with windows and is installed, downloaded vc distros
16gb ram, ryzen 4 core at 3.8ghz, 5700xt
Fresh windows was downloaded from website last week.
I also did a fresh install of windows at bl3 launch.
I just feel im missing a bit of software or something as it ran fine previously last week. Or my windows is bad? I need the dx12 fps boost as my cpu sucks