661-6024 - Apple i3 3.1GHz Dual-Core CPU Logic Board (Motherboard) for iMac 21.5-inch Late 2011

Technical Specs:
- Processor: Intel Core i3-2100 (3.1GHz) dual-core
- Graphics: AMD Radeon HD 6750M with 512 MB of dedicated GDDR5 memory
- Memory: Two 204-pin PC3-10600 (1333 MHz) DDR3 SO-DIMM slots, supports up to 16 GB of RAM
- Storage: SATA hard drive or SSD
- Expansion: One Thunderbolt port, four USB 2.0 ports, SDXC card slot, FireWire 800 port, Gigabit Ethernet port
- Audio: Built-in stereo speakers, microphone, headphone jack, support for Apple iPhone headset with microphone
- Display: 21.5-inch LED-backlit display with IPS technology, 1920x1080 resolution
- Wireless: Wi-Fi 802.11n, Bluetooth 2.1 + EDR
- Camera: FaceTime HD camera
- Dimensions: 17.75 x 20.8 x 6.9 inches (45.1 x 52.8 x 17.5 cm)
- Weight: 20.5 pounds (9.3 kg)

Helpful Notes:
- This logic board is compatible only with the 21.5-inch iMac released in late 2011.
- Upgrading the RAM to the maximum capacity can significantly improve the performance of the iMac.
- The Thunderbolt port allows for high-speed data transfer and can be used to connect external displays or storage devices.