This is thenon-SSD version of the 2017 iMac logic board. Graphics: AMD Radeon Pro 555 (2GB GDDR5). Apple iMac 21.5" 4K 2017 Logic Board i5 3.4GHz Radeon Pro 560 4GB 820-00597-A. Apple iMac 21.5" A1418 2017 Logic Board i5-7360U Iris Plus 640 820-01069-B.
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