A-Tech 64GB (4x16GB) RAM for Dell PowerEdge R320, R420, R420XR, R520, R620, R720, R720XD, R820, R920 | DDR3 1600MHz ECC-RDIMM PC3-12800 2Rx4 1.5V ECC Registered DIMM Server Memory Upgrade Kit

• Capacity: 64GB (4x 16GB Modules) | Type: DDR3 DIMM 240-Pin | ECC Type: ECC-RDIMM (Registered DIMM) | Speed: 1600MHz PC3-12800 / (PC3-12800R) | Rank: 2Rx4 (Dual Rank x4) | Voltage: 1.5V Designed for the Dell PowerEdge Rack Server Models: R320, R420, R420XR, R520, R620, R720, R720XD, R820, R920 Compatible with Intel Pentium 1400 series, Xeon E5-1410/E5-1410 v2 series, Xeon E5-2400/E5-2400 v2 series, Xeon E5-2600/E5-2600 v2 series, E5-4600/E5-4600 v2 series, Xeon E7-2800 v2 series, Xeon E7-4800 v2 series, and Xeon E7-8800 v2 series CPU Processors This item is ECC Registered memory and is NOT compatible with Desktop or Laptop systems which only support NON-ECC Unbuffered memory | *Please refer to your system's manual for proper memory seating and channel guidelines* A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase