I just tested memtest_vulkan on linux, everything default but set Mclk to 1300, and it passed. But, there was still some flickering, not non-stop, but every once in a while I would get a flicker.
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Basically no increase with default voltage either. If I bump mclk +10 it starts to flicker. Set it back to 1250 and no more flickering. I will have to test that on windows when I get some time.
Fedora 39 + Mesa 23.3.2. Yea, the mclk is stable at 2500mhz default and even increasing it say 50mhz seems to cause flickering, that will sometimes go away then come back. Adrenaline version is latest, 23.12.1.
Windows:
mclk: 2650 clk: 3000 voltage: 1020 power limit: 15%Linux LACT settings:
mclk: 1325 clk: 3000 voltage offset: -80 power limit: 333wIt’s a powercolor hellhound 7900xt.
> cat pp_od_clk_voltage OD_SCLK: 0: 500Mhz 1: 2815Mhz OD_MCLK: 0: 97Mhz 1: 1250MHz OD_VDDGFX_OFFSET: 0mV OD_RANGE: SCLK: 500Mhz 5000Mhz MCLK: 97Mhz 1500Mhz VDDGFX_OFFSET: -450mv 0mv
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I’ve got 3 displays. I just noticed something interesting; if I apply my settings in LACT I notice some flicker, if I then logout of my gnome session and relogin it seems fine, no flickering yet. I’ll do some more testing.