HP 4GB DDR3 SDRAM Memory Module - 4 GB (2 x 2GB) - DDR3-1866/PC3-14900 DDR3 SDRAM - 1866 MHz - Non-ECC - Unbuffered - 240-pin - DIMM E1J63AV

HP 4GB DDR3 SDRAM Memory Module - 4 GB (2 x 2GB) - DDR3-1866/PC3-14900 DDR3 SDRAM - 1866 MHz - Non-ECC - Unbuffered - 240-pin - DIMM

CTO 4GB DDR3-1866 2X2GB 2CPU

Technical Specifications:
Memory Size: 4 GB
Memory Technology: DDR3 SDRAM
Number of Modules: 2 x 2GB
Memory Speed: 1866 MHz
Memory Standard: DDR3-1866/PC3-14900
Error Checking: Non-ECC
Signal Processing: Unbuffered
Number of Pins: 240-pin
Form Factor: DIMM