Computer Memory Solutions CM512648500SODRH 8GB (2x4GB) DDR3 1066MHz CL7 SODIMM for iMac 27-Inch Late 2009

8GB DDR3 SO-DIMM Kit for 2009 iMac

This 8GB kit contains two 4GB modules built to the DDR3 1066 MHz standard with CL7 timings. The 204-pin SO-DIMM format matches the memory slots in the specified Apple desktop. Computer Memory Solutions brands each stick with major-brand components and tests for direct compatibility with the target system. The kit delivers 8GB total capacity across the two modules.

Suits owners of the late 2009 27-inch iMac

The memory is validated for the iMac identified as MB953LL/A, iMac11,1 and A1312. Buyers whose machines accept only slower DDR3 speeds, require ECC or registered modules, or need a single 8GB stick instead of a paired kit should look at something else. Systems limited to lower maximum capacities or different pin layouts will not accept these modules.

204-pin DDR3 1066 MHz CL7 specification

The decisive figure is the DDR3 1066 MHz (PC3-8500) speed combined with CL7 latency and 1.5 V operation. Unbuffered, non-ECC, 2Rx8 organisation and the 204-pin SO-DIMM form factor must match the host platform exactly. If the target computer demands a different speed grade, voltage or pin count, this kit will not function.