What to do when your iMac won't turn on? - IT-Tech Online
New iMac 24" with Retina 4.5K Display - Apple M1 Chip 8-Core CPU, 8-Core GPU - 8GB Memory - 256GB SSD | Costco
hardware - Is it possible to replace the GPU in this 2006 iMac? - Ask Different
Amazon.com: 2GB Graphics Video Card Upgrade for Apple iMac Mid-2011 27 Inch Core i5 MC814LL/A MC814 A1312 Desktop All-in-One PC, AMD Mobility Radeon HD 6970M Replacement Repair Parts : Electronics
2011 iMac Graphics Card Upgrade | How to • Mac Expert Guide