Memory Technology: : DDR3 SDRAM Storage Capacity: : 4 GB Memory Form Factor: : DIMM 240-pin Memory Modules Quantity: : 2 Provides Error Checking Method: : Non-ECC Memory Module Configuration: : 512 x 64 Memory Speed: : 1600MHz(PC3-12800) Lead Plating: : Gold CAS Latency: : CL9 TRCD: : 9 TRP: : 9 TRAS: : 27 Memory Features: : Unbuffered Intel Extreme Memory Profile KHX1600C9D3B1K2/8GX