macOS Sonoma on a Late 2013, 27 inch iMac. Great succes! : r/OpenCoreLegacyPatcher
Baking a Graphics Card | macman860
Apple iMac 21.5-inch and 27-inch (Late 2013) reviews | Macworld
imac 27 inch 2013 graphic card faulty repair - YouTube
For iMac 21.5" A1311 Mid/Late 2011 6770 AMD upgrade Nvidia K610m 1GB Video Card | eBay
iMac (27-inch, Late 2013) - Technical Specifications
How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld
Upgrading the $500 2013 iMac to the Max! - YouTube
New CPUs, faster Wi-Fi, same flaws: Apple's 2013 iMac reviewed | Ars Technica
iMac GPU Upgrade, Metal SUPPORTED!! - YouTube
2011 iMac Graphics Card Upgrade | MacRumors Forums
How to Upgrade/Replace GPU Graphics Card on Mid-2011 21.5" iMac - YouTube
Original For iMac 21.5" A1311 27" A1312 K610M GDDR5 1GB Upgrade Graphic Video Card GPU N15M-Q2-B-A1 For HP ZBook 15 - AliExpress
Baking a Graphics Card | macman860
2013 iMac teardowns reveal SSD slots, soldered-in CPU in the 21.5” model | Ars Technica
Upgrading the $500 2013 iMac to the Max! - YouTube
2011 iMac Graphics Card Upgrade | Page 124 | MacRumors Forums
Maximizing the GPU in your MXM-based iMac | Low End Mac
Mac Pro Late 2013 Graphics Card Replacement - iFixit Repair Guide
For iMac 27" A1312 Mid 2009 2010 2011 upgrade NVIDIA GTX 780M 4GB Video Card | eBay
Apple iMac (27-inch, September 2013) review: New processors and faster Wi-Fi for Apple's slim desktop - CNET
Apple 27-Inch iMac (Late 2013) Review, Haswell Inside | HotHardware
iMac Graphics Issue – Expert Mac Repair Lewisville
2011 iMac Graphics Card Upgrade | MacRumors Forums
