I would try to play another game to see if this issue is repeated. Try something like LOL or DOTA2 or even TF2. Play it for the same period of time you would expect to see the Freeze. Also, if WoW is loaded onto the SSD then try moving it to the regular HDD. This is to try and isolate the problem. Should be able to cut and paste it to the D drive or whatever you HDD is called. Make a folder on the D drive called Program File (x86) and put it in there. Launch the game from there and see if the game still freezes. Cause if not, then the SSD is no good.