I bought no-name 2 x 8GB PC3-8500 RAM for my mid-2010 Mini from eBay. When I first installed the RAM, the screen froze up after booting so I tested eack stick individually and had no problems with individual sticks. I have EFI v1.5. When I installed the two 8GB sticks again, the screen froze again. I switched their positions and this time my system is stable and operational. Is the freezing problem a sign of bad RAM or did I simply install the RAM poorly the first few times? I would like to come to a conclusion before the RMA period expires. Thanks!