https://bugs.freedesktop.org/show_bug.cgi?id=81644
--- Comment #111 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #110)
I found this post, stating some of the ASUS hardware comes PRE-OVERCLOCKED from the factory. Good chance this is the cause of my instability?
http://www.tomshardware.com/answers/id-2041324/problem-asus-270x-screen- blank-game.html
My GPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121802&nm_mc=KN... GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Desktop+Graphics+Cards-_- N82E16814121802&gclid=COjjs6v3_MACFRAR7Aod_2EAqQ
Core clock is listed at 1120 Mhz, not 1050 Mhz.
Radeon already limits the clocks in certain cases depending on the vbios tables. You can disable dpm which will keep the chip at the default boot up levels (usually some where in the range of 300e/150m) for testing. Append radeon.dpm=0 to the kernel command line in grub.