same me. msi 480 gaming x 4Gb hynix Vram
Can up to ~31mhs but miner can't work long time and to use total 580W . 3 vga+main... . In the CPUZ is 120~130W
http://2.pik.vn/201755b52bf0-f6d5-4d20-82de-4a7cc9f91d03.jpg

I adjusted speed down to 29mhs and to use total 465W . CPUZ use 83W/Vga
http://2.pik.vn/2017f203ecd2-0c07-44d3-8154-c97e00d4599d.jpg