I'm at work right now- don't remember all my system specs off hand, but
Desktop
8 GB system RAM
AMD - Radeon something card with 1GB RAM (no fan)
Just looking for a good video card, not going to buy a new PC.
I'd like to spend less than $200
my current setup is Radeon HD 7870XT with 8 GB Ram (2 Stick) ,
play DoS 1080P resolution with most of setting on High. work flawlessly...

but a few days a go, i have a random BSOD problem with my computer.
so i replaced some component with the older model
downgrade the RAM to 4 Gb (1 stick) and use Radeon HD 7770
DOS still playable with this setup, a little FPS Drop at city center area, but overall works great