Today picked up a $20 2011 iMac 27” with working gpu too! : r/mac
SOLVED: What GPU's are compatible with iMac 27" 2011? - iMac Intel 27" EMC 2429 - iFixit
iMac 27" mid-2011 GPU upgrade
Picked up this iMac (27", mid 2011) i7 @ 3.4GHz , 16 gb ram , 256 SSD in excellent condition for $210. Should I make any upgrades ? GPU, bigger SSD? Thanks : r/LukeMianiYouTube
For iMac 27" A1312 Mid 2009 2010 2011 upgrade NVIDIA K3100M 4GB GPU Video Card | eBay
iMac 2011 GPU upgrade to NVIDIA 770M with new VBIOS - YouTube
iMac 2011 GPU upgrade to NVIDIA 770M with new VBIOS - YouTube
Amazon.com: Original 2GB Graphics Video Card Upgrade Replacement for Apple iMac Mid-2011 27 Inch A1312 Core i7 3.4 MD063LL/A MD063 Desktop PC Computer, AMD ATI Radeon HD 6970 Spare Parts Full Tested :
GDDR5 2GB Grafikkarte Radeon HD 6970M, für for Apple iMac Mitte 2011 27 Zoll Core i5 i7 All-in-One Desktop PC Computer, AMD Radeon HD6970M HD6970 MXM Board GPU Upgrade Ersatzteile: Amazon.de: Computer
iMac 2009 / 2010 / 2011 GPU upgrade — Fixing LED/LCD PWM brightness with an ESP32 | by Fixing Things | Medium