I've reproduced the bug again (this time it took around 5 minutes to crash my
system after opening up a game) to make sure the xorg log had nothing of value
since I was not sure I had checked this file in specific. I'll attach my log
file next. Of particular note are almost 80000 lines of output similar to this:

[  6115.586] (II) RADEON(0): EDID vendor "AOC", prod id 6512
[  6115.587] (II) RADEON(0): Printing DDC gathered Modelines:
[  6115.587] (II) RADEON(0): Modeline "1366x768"x0.0   85.50  1366 1436 1579
1792  768 771 774 798 +hsync +vsync (47.7 kHz eP)
[  6115.587] (II) RADEON(0): Modeline "1360x768"x0.0   85.50  1360 1424 1536
1792  768 771 777 795 +hsync +vsync (47.7 kHz e)
...

Also I forgot to mention there are two types of crashes: one in which the
computer instantly reboots and the other in which the image on-screen freezes
in the last drawn frame, the sounds enters a short loop around half a second
long (probably the sound buffer repeating its last contents) and the entire
system becomes unresponsive, which forces a manual reboot.