8GB Dual Channel Kit 2x 4GB SAMSUNG Original 204 pin DDR3-1333 PC3-10600 CL9 DDR3 SO-DIMM for current i5 + i7 notebooks with DDR3-1333MHz support (electronics)
Have the two latches in my iMac 27 "i7 (mid. 2010) with the two original 2x2GB there. Have so far not found any problems for a week. Apple Hardware Test gave the green light. 12GB RAM fun! :)