[Bug 206351] RX 5600 XT Not Correctly Recognized, Max Memory Frequency Below Where it Should Be

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https://bugzilla.kernel.org/show_bug.cgi?id=206351

--- Comment #4 from Alex Deucher (alexdeucher@xxxxxxxxx) ---
(In reply to Matt McDonald from comment #3)
> This is the card and its specifications from the official website:
> https://www.sapphiretech.com/en/consumer/pulse-radeon-rx-5600-xt-6g-
> gddr6#Specification
> 

The 1750 Mhz clock on the webpage is the engine boost clock which is inline
with the settings for your card.

OD_SCLK:
1: 1780Mhz

With respect to the memory clock, The default clock on your board is 900Mhz and
it has a 192 bit interface.  GDDR6 sends data on the rising and falling edge of
the wave, so you multiply it by two.  Hence:

OD_MCLK:
1: 900MHz

900 Mhz * 192 bit * 2 = 345,600 Mbps = 337.5 Gbps

Which is right in line with the bandwidth for your card.

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