... chip ic, 100% original 4.non-ecc, for PC ram ddr2 2gb128MB/256MB/512MB/1G/2G/4GDesktop Computer,laptop computer, notebook ... burst access16) Programmable burst length: 2, 4, 8 17) Programmable/CAS latency (CL): 3 .18) Programmable output driver strength: Normal/weak19 ... ) 20) 7.8US maximum average periodic refresh interval 21) Posted CAS by programmable additive latency for better command and data bus ...