... /Laptop memory ram ddr,ddr2,ddr3/ 512mb,1gb,2gb,4gb/best quality/OEM/Original chip/8 bitsDesktop/Laptop memory ram ddr,ddr2 ... 7) Bi-directional, differential data strobe (DQS) is transmitted/received with data, to be used in capturing data at the receiver8 ... (CK and CK)11) DLL aligns DQ and DQS transitions with CK transitions.12) Commands entered on each positive CK edge ...