Apple 661-00680 | 2.8GHz CPU 16GB RAM Discrete GPU Logic Board (Motherboard) for MacBook Pro A1398

1. Processor: 2.8GHz quad-core Intel Core i7 processor
2. RAM: 16GB DDR3L SDRAM
3. Graphics: Discrete GPU (NVIDIA GeForce GT 750M with 2GB GDDR5 memory)
4. Compatibility: MacBook Pro A1398 (Mid 2014)
5. Ports: Two Thunderbolt 2 ports, HDMI port, two USB 3.0 ports, SDXC card slot, headphone jack
6. Connectivity: 802.11ac Wi-Fi, Bluetooth 4.0
7. Storage: Supports up to 1TB PCIe-based flash storage
8. Audio: Stereo speakers, dual microphones, headphone port
9. Display: 15.4-inch Retina display with IPS technology, 2880x1800 resolution
10. Camera: 720p FaceTime HD camera
11. Battery: Built-in 95-watt-hour lithium-polymer battery with up to 8 hours of wireless web browsing
12. Dimensions: 14.13 x 9.73 x 0.71 inches (35.89 x 24.71 x 1.8 cm)

Helpful notes:
1. This logic board is a great replacement option if your MacBook Pro is experiencing performance issues.
2. The discrete GPU provides improved graphics performance for tasks such as video editing and gaming.
3. Upgrading the RAM to the maximum capacity of 16GB can greatly improve multitasking capabilities.