Hello AMD Community,
I use an ASUS R7260X Direct C.U II OC Edition graphics card. I was having weird checkers-like artifacts which happened randomly between 1-5 hours gameplay time. After searching for a solution for a long time, I tried downclocking the memory from 1750 Mhz to 1445 Mhz and it worked. But now with the Radeon Wattman that came to R7260 with 16.12.1 driver update, I can no longer downclock the memory. I can only use the slider from 1750 to 1800 Mhz. I switched back to 16.11.5. Also, the 16.12.1 update caused more problems than just checker-like artifacts. I am open for any kind of help.
More people are having the same problem as you. I am one of them.
This topic: Crimson 16.12.1 underclocking memory speed
And this topic: Downclocking with AMD Wattman
I am actually happy to see that more people need a downclock feature to let their graphics card run stable, AMD can't ignore this issue now.