Logic Board, 8-core CPU, 8-core GPU, 8GB, 2TB
Apple Part Number: 661-16549
1-Year Warranty
Full replacement
Fast Shipping
1-2 business days
Tested & Verified
QA before ship
Expert Help
Install guidance
Compatibility
| Model | Order # | Model # | EMC | Identifier | Processor |
|---|---|---|---|---|---|
| iMac (24-inch, M1, 2021, 4-port) | MGPC3LL/A | A2438 | 3663 | iMac21,1 | Apple M1 8-core |
| iMac (24-inch, M1, 2021, 2-port) | MJV93LL/A | A2439 | 3664 | iMac21,2 | Apple M1 8-core |
| iMac 24-inch M1 2021 | A2438, A2439 | iMac21,1 / iMac21,2 | Apple M4 | ||
| iMac 24-inch M3 2023 | A2710 | iMac23,1 | |||
| iMac 24-inch M4 2024 | A3533 | iMac24,1 |
Shop all parts for this Mac
About this part
The Logic Board, 8-core CPU, 8-core GPU, 8GB, 2TB (Apple part number 661-16549) is a genuine Apple part that fits the iMac (24-inch, M1, 2021, 4-port), iMac (24-inch, M1, 2021, 2-port), iMac 24-inch M1 2021 and 2 other models. The logic board carries the processor, memory, power management and every connector, so it decides whether the Mac powers on at all.
Before you order, match the model identifier on your Mac (Apple menu, About This Mac, System Report) to one of the identifiers listed for this part: iMac21,1, iMac21,2, iMac21,1 / iMac21,2, iMac23,1 and iMac24,1.
Signs the logic board needs replacing
- No power, no chime, or a black screen even though the charger light is on
- Random shutdowns, restart loops, or kernel panics that survive a clean macOS install
- Liquid damage, corrosion, or a burnt smell near the board
- Ports, Wi-Fi, or USB-C charging that stop working all at once
Not sure the logic board is the real cause? Our logic board repair service starts with a full diagnosis, and we can install this genuine Apple part for you through our iMac repair service, in our Tampa shop or by mail-in repair from anywhere in the US.
Free Apple Repair Manuals & Reference Guides
Browse step-by-step service manuals, model specs and screw-placement charts for Mac, iPhone and iPad.
Popular Model Guides