3.2GHz Processor 

1TB Storage

3.2GHz quad-core Intel Core i5 processor

Turbo Boost up to 3.6GHz

8GB (two 4GB) memory, configurable up to 32GB

1TB hard drive

AMD Radeon R9 M380 with 2GB video memory

Retina 5K 5120x2880 P3 display

3.2GHz Processor 

1TB Storage

3.2GHz quad-core Intel Core i5 processor

Turbo Boost up to 3.6GHz

8GB (two 4GB) memory, configurable up to 32GB

1TB Fusion Drive

AMD Radeon R9 M390 with 2GB video memory

Retina 5K 5120x2880 P3 display

3.3GHz Processor 

2TB Storage

3.3GHz quad-core Intel Core i5 processor

Turbo Boost up to 3.9GHz

8GB (two 4GB) memory, configurable up to 32GB

2TB Fusion Drive

AMD Radeon R9 M395 with 2GB video memory

Retina 5K 5120x2880 P3 display