NEW Apple iMac 27" A1312 mid 2011 AMD HD 6970M 2GB DDR5 GPU Video Card HD6970 | eBay
Original For Apple Imac 27" A1312 Vga Card Gpu 216-0732019 Video Card Graphic Card 109-b90957-00 Hd4850 512mb Full Tested - Pc Hardware Cables & Adapters - AliExpress
Base M1 iMac With 8-Core CPU, 7-Core GPU Features Just One Fan for Cooling -
Refurbished 24-inch iMac Apple M1 Chip with 8‑Core CPU and 8‑Core GPU, Gigabit Ethernet - Yellow - Apple
GPU Nvidia N13E-GT-W-A2 Graphic Video IC Chip for iMac 27" A1419 (Late 2012)