Crucial CT51264BC1067 Memory Module Computer Component

4GB 204-PIN SODIMM DDR3 PC3-8500 NOTEBOOK MEMORY, SPECS:
DDR3 204-PIN SODIMM: APPROXIMATELY 2.6 IN. BY 1.75 IN. (66 MM BY 44.45 MM)
IN SHORT, 204-PIN SMALL OUTLINE DUAL INLINE MEMORY MODULES (SODIMMS) ARE THE FORM FACTOR USED TO PROVIDE DDR3 MEMORY MODULES FOR NOTEBOOK COMPUTERS AND OTHER SMALL FORM FACTOR COMPUTING PLATFORMS. 204-PIN SODIMMS ARE CURRENTLY AVAILABLE IN PC3-8500 (DDR3 1066MHZ) SPEEDS.
TO USE DDR3 MEMORY, YOUR SYSTEM MUST HAVE BOTH A 204-PIN SODIMM SLOT AND A CHIPSET THAT SUPPORTS DDR3 MEMORY. A DDR3 SODIMM WILL NOT FIT INTO DDR2 OR DDR MEMORY SOCKETS. (INFORMATION ABOUT WHICH MEMORY TECHNOLOGY YOUR SYSTEM USES IS INCLUDED IN THE CRUCIAL MEMORY ADVISOR™ TOOL.)
SODIMMS ARE SMALLER AND THINNER THAN REGULAR DIMMS, AND THE 204-PIN SODIMM PCBS ARE ALWAYS ~2.6 INCHES LONG AND ARE USUALLY AROUND 1.75 INCHES HIGH (THOUGH THE HEIGHTS CAN VARY SLIGHTLY). THEY CONSIST OF A NUMBER OF MEMORY COMPONENTS (USUALLY BLACK) THAT ARE ATTACHED TO A PRINTED CIRCUIT BOARD (USUALLY GREEN). THE NUMBER OF MEMORY COMPONENTS ON A 204-PIN SODIMM'S PRINTED CIRCUIT BOARD (PCB) CAN VARY, BUT THE PCB WILL ALWAYS HAVE 102 PINS ON THE FRONT AND THE BACK BOTH, FOR A TOTAL OF 204 PINS. THE GOLD PINS ON THE BOTTOM OF THE SODIMM PROVIDE THE CONNECTION BETWEEN THE MEMORY MODULE AND THE MEMORY SOCKET.