32GB Kit (4x 8GB Modules) | DDR3 1333 MHz ( PC3-10600R ) | DDR3 DIMM ( 240-pin ) | ECC RDIMM (Registered DIMM) | 2Rx4 - Dual Rank x4) | 1.5V - DDR3 Standard Voltage High performance Memory RAM upgrade designed for HP Integrity BL860c i4 This item is ECC Registered memory and is NOT compatible with Desktop or Laptop systems which only support NON-E A-Tech 32GB Kit (4x8GB) Memory RAM for HP Integrity BL860c i4 - DDR3 1333MHz PC3-10600 ECC Registered RDIMM 2Rx4 1.5V - Server