My iMac comes with Hynix 8GB kit (4Gx2). I want to upgrade with Corsair 16GB (8Gx2) http://www.corsair.com/en-au/corsair-memory-8gb-ddr3l-sodimm-memory-cmso8gx3m1c1600c11 So My iMac will have 24G Ram. I wonder these rams are compatible with others? Are there any problems (Can they run at speed 1600MHz?, Start up problem?)? Thanks for your answers.