Prior to RX 580 - https://pcpartpicker.com/b/PzGG3C
Yes. LinuxBox, my workstation, has now gained gaming powers! With the sweet boxing day sales I picked up a Nitro+ RX 580 4GB removing the GT 1030. Steam and Lutris are working amazing! See DOOM 2016 here: https://youtu.be/NSzklxpSdbQ
I had the machine on my Alienware monitor but I have moved it to my right as a second machine I can run and use all the time.
Video card is new, speakers are new. The rest I had from other builds. GPU sits at around 68c under full load. System idle is 50 watts. Under full stress load of GPU and CPU it uses 315 watts.
The Edifier R1280DB's are connected via digital coax. PulseAudio set to s32le 48Khz.
For those wondering the machine on the left is my R7 1700X, GTX 1070, 34" Gsync Windows desktop.
April 2019 UPDATE
Watercooled the RX 580 with an Antec Kuhler H2O 620 and NZXT Kraken G12.
Much temp drop: https://www.youtube.com/watch?v=VLeVlDLXuoM