1GB 2Rx16 PC2-6400S-666-12-A3 — Memory Module
Overview
This is a DDR2 laptop memory module with a capacity of 1GB. It uses a 200-pin SO-DIMM interface, runs at 800MHz, and falls under the PC2-6400 specification.
Core Technical Specifications
· Capacity: 1GB
· Type: DDR2 SDRAM (Laptop Memory)
· Interface: 200-pin SO-DIMM
· Speed: 800 MHz (PC2-6400)
· Voltage: 1.8V
· Rank/Organization: 2Rx16 (Dual Rank, 16 chips total — 8 per side, x16 width each)
· Latency: CL6 (corresponding to the “666-12” in the label)
Decoding the Full Part Number
· 1GB — Total module capacity
· 2R — Dual Rank (two sets of chips accessed alternately)
· x16 — Each chip has a 16-bit data width (16 chips × 16-bit ÷ 2 ranks = 64-bit bus per rank)
· PC2-6400 — DDR2, 800 MHz effective data rate
· S — SO-DIMM (laptop form factor)
· 666-12 — CAS latency 6, tRCD 6, tRP 6, tRAS 12 (in clock cycles)
· A3 — Manufacturer-specific revision or die revision code (Samsung, Made in Korea)