Total Micro 4GB Certified Memory Module - DDR3L UDIMM 1600MHz Non-ECC - For Desktop PC - 4 GB - DDR3L-1600/PC3-12800 DDR3L SDRAM - 1.35 V - Non-ECC - Unbuffered - 240-pin - DIMM A8733211-TM

Total Micro 4GB Certified Memory Module - DDR3L UDIMM 1600MHz Non-ECC - For Desktop PC - 4 GB - DDR3L-1600/PC3-12800 DDR3L SDRAM - 1.35 V - Non-ECC - Unbuffered - 240-pin - DIMM
Technical Specifications:
Memory Size: 4 GB
Memory Technology: DDR3L SDRAM
Memory Voltage: 1.35 V
Memory Speed: 1600 MHz
Memory Standard: DDR3L-1600/PC3-12800
Error Checking: Non-ECC
Signal Processing: Unbuffered
Device Supported: Desktop PC
Number of Pins: 240-pin
Form Factor: DIMM
Compatibility: Dell Optiplex Desktop PCs:

3040, 3040 MT, 3040 SFF, 5040 MT, 5040 SFF