Ballistix Tactical 8GB Kit (4GBx2) DDR3 2133 MT/s (PC3-17000) UDIMM 240-Pin - BLT2K4G3D21BCT1J Cas Latency: 11 Timing: 11-11-11-27 Buffered/Registered: Unbuffered Features: BLT2K4G3D21BCT1J is an 8GB kit consisting of (2) 4GB DDR3 Performance modules that operates at speeds up to 2133 MT/s and has a CL11 latency with extended timings of 11-11-11-27. It is Performance and is non-ECC. It conforms to the industry standard UDIMM layout of 240 pins and is compatible with computers that take DDR3 UDIMM memory.