This Sapphire graphics card is one option for you if you're upgrading your computer. The GDDR6 memory clocks in at 20 GB. You also get a 2.08 GHz GPU clock speed.
From Amazon
Sapphire 11323-02-20G Pulse AMD Radeon RX 7900 XT Gaming Graphics Card with 20GB GDDR6, AMD RDNA 3
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