Apple 661-4218 | 1.8GHz CPU Logic Board (Motherboard) with Heatsink for MacBook Retina 13-inch A1181

Here are the technical specifications for the Apple 1.8GHz CPU Logic Board (Motherboard) with Heatsink for MacBook Retina 13-inch A1181:

1. Processor: 1.8GHz CPU
2. Graphics: Intel GMA X3100 graphics processor with 144MB of DDR2 SDRAM shared with main memory
3. Memory: 2GB of 667MHz DDR2 SDRAM (PC2-5300) on two SO-DIMMs
4. Storage: 80GB 5400-rpm Serial ATA hard disk drive
5. Optical drive: 8x slot-loading SuperDrive (DVD±R DL/DVD±RW/CD-RW)
6. Ports: One FireWire 400, two USB 2.0 ports, and a Mini-DVI port
7. Networking: Built-in 10/100/1000BASE-T (Gigabit) Ethernet
8. Wi-Fi: Built-in AirPort Extreme Wi-Fi (based on IEEE 802.11n draft specification)
9. Bluetooth: Built-in Bluetooth 2.0 + EDR (Enhanced Data Rate) module
10. Audio: Built-in stereo speakers and omnidirectional microphone, combined optical digital audio input/audio line in, combined optical digital audio output/headphone out
11. Display: 13.3-inch (diagonal) glossy widescreen TFT display with support for millions of colors, 1280x800 resolution
12. Operating System: Mac OS X 10.5 Leopard

Helpful notes:
1. This logic board is compatible with the MacBook Retina 13-inch A1181 model only.
2. The heatsink helps to dissipate heat from the CPU, preventing overheating and damage to the logic board.
3. Upgrading the RAM and hard drive can improve the performance of your MacBook.