Product details of Apple MK462LLA 27" iMac with Retina 5K Display

ProcessorIntel Core i5 Quad-CoreBase Clock Speed3.2 GHzMax Boost Speed3.6 GHzMemory Slots4 x SO-DIMMMemoryInstalled: 8 GB
Capacity: 32 GBGraphics CardAMD Radeon R9 M380 with 2 GB GDDR5 VRAM

Display
Size 27"
Aspect Ratio 16:9
Native Resolution 5120 x 2880
External Resolution Up to 5120 x 2880
Drives
Storage Drive 7,200 rpm HDD; SATA
Input/Output Connectors
Ports 2 x Thunderbolt 2
4 x USB 3.0
Display 2 x Mini DisplayPort via Thunderbolt port
Audio 2 x Integrated Speaker
2 x Integrated Microphone
1 x 1/8" (3.5 mm) Headphone/Microphone Combo Jack
Media Card Slots SD/SDHC/SDXC