8GB KIT 4GBX2 DDR3-1067mhz MacMini Late 2009
The 8GB Kit contains (2) 4GB DDR3-1067Mhz , PC3-8500, CL=7, Non-ECC, Unbuffered, 1.5V, 204pin SO-DIMM.
For Mac Mini Early to Late 2009, Late 2009 Server
The 2009 Mac Mini has two memory slots. It is preloaded from the factory with two 1GB or 2GB DDR3-1066 SO-DIMMs. You can install a maximum of 8GB with the Eagle Memory 8GB kit (4GB x 2 SO-DIMMs.) The 8GB upgrade requires the Apple Firmware Update 1.2 released in August 2009.
Non-Stacked IC's: Eagle Memory uses a Non-stacked module for the DDR3-1066 module for the Mac mini. The cheaper stacked IC variety of SO-DIMM draws more power, which increases heat and can cause increased errors. Eagle Memory only uses premium non-stacked chips.