Unbuffered PC3-12800E (1600MHz) sticks. 32GB (4x 8GB). Part number Kingston KVR16E11K4/32. 

Specifications

  • Mfr Part Number: KVR16E11K4/32
  • Type: DDR3
  • Capacity: 32GB (4x 8GB)
  • Speed: PC12800 1600MHz
  • Size & Bit: 1G x 72
  • Pins: 240pin
  • ECC: Yes
  • Registered: No
  • CL 11, 1.5V