“Had sucessfully been using Samsung 16GB EVO in RPiB+. However using latest NOOBS image on that card, and installing Raspian on RPi2, the RPi2 would always boot without problems from power up, or a reset, but a reboot would fail 10% of the time, each time displaying a succession of memory errors. After repeated re-formatting/re-imaging, etc, it was clear that the EVO appeared to have marginal timing problens when used in the faster RPi2. Purchased the Sandisk Ultra from Pi Hut and all the problems have gone. The EVO has since been returned to the RPi B+, and as previously, it too is working successfully. I now see that others have experienced card compatibility problems with the RPi2, the EVO being one of the problem cards. Thus from my experience, I would recommend the Sandisk Ultra for anyone who has a RPi2.”
