Axiom 4GB DDR3-1333 UDIMM for Dell # A2507437, A2578593, A3013701, A3132536 - 4 GB (1 x 4 GB) - DDR3 SDRAM - 1333 MHz DDR3-1333/PC3-10600 - Non-ECC - Unbuffered - 240-pin - DIMM

Up to 1333 MHz speed for smooth computer performance 4 GB memory allows you to have more programs open at a time 240-pin-pin DDR3 SDRAM operates at an effective bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation