i received an rx480 sapphire nitro 4G but does not look good it s slower than my 470's 4g and it use lot more power
i notice it has Hynix memory, looks not great the 470's have elpida what i was able to mod easily
get some more than 700mh with the 470 1220gpu 1920memory
rx480 original bios it run at 1320/1950 get 600mh only, can slow down the gpu to 1270 for same speed
i used polaris bios editor for the rx480 but cannot see the memory frequencies
so i tested all the 6 last timing, the slowest one was working but speed not great
and the 5 last timing they all crash
i gonna test 1 or 2 slower but i guess it s not gonna be great
i ve got the rx480 cheaper but same price than the 470 but if it s slower it s not great
I fucking love Hynix - haven't tried Elpida yet.
i send the 480 back and get an other 470
Did you try to mod the memory timings in bios? I got ~740MH/s for all of my a Sapphire ref. 470 4GB cards. And don't forget: CN miner isn't optimized for Polaris cards (yet).