[tossandturn]

Worst place to ask this, I know, but... If I wanted to upgrade my old machine that currently has an HD 4770 (PCI Express 2.0 x16), where exactly could I find a worthwhile upgrade for less than $20?

[ryan-allen]

And there's this place, too: http://www.logicalincrements.com/

[jjcm]

Reddit's r/buildapc is probably your best starting point. It has a bunch of helpful tips/guides even for super low end builds.