•Performance: Speed Sort DIMM CAS Latency fck – Clock Frequency tck – Clock Cycle fDQ – DQ Burst Frequency PC3-8500 -BE 7 533 1.875 1066 PC3-10600 -CG 9 667 1.5 1333 PC3-12800 -DI 11 800 1.25 1600 MHz.