Trying using a different SATA cable for the SSD. I really like the blue SATA cables that ship with the newer intel motherboards. They click and lock into place real nice and support the SATA 6 speed. The older red cables are very hit or miss.
As for the temperature thing, the unsupported message may in fact be what's going on. There is no SMART field for temperature as reported in the toolbox. Don't worry about it.