Comment # 74
on bug 76490
from Maxim Sheviakov
(In reply to Maxim Sheviakov from comment #73) > (In reply to Alex Deucher from comment #72) > > (In reply to Maxim Sheviakov from comment #71) > > > Hmm, nice point. By the way, is the MCLK kinda divided by four? So, if > > > Memory Clock is 5600MHz, I'll have to do 5600/4*10000 to get the correct > > > value? It's like, 120000 value = 1.2GHz*4 = Original frequency = 4800MHz, > > > right? If that's it, I'll fix my quirk (AGAIN, LOL) and try using 970MHz and > > > 5600MHz written as needed, 'cause my GPU is MSI R7 370 Armor 2X, and looks > > > like values in quirk are *kinda* low for it. > > > > The mclk values are the actual mclk values. GDDR5 is quad pumped so you get > > 4x effective data rate per clock. That might be what you are thinking of. > > Looks like I get it now. Today I'll try to play with those values and > experiment with MCLK values, maybe with GPU clock too; if it's good, I will > let everyone know. So right now I'm building a test kernel based on Linux Zen 4.3. Changed values in my line: from "{... 0, 120000}," to "{... 97000, 140000}", so that GPU clock is 970MHz and Memory clock is 1.4GHz aka 5.6GHz. Will let you all know if I succeed in that.
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