Man of Honour
As mentioned before, it appears thats its fermi gpu related, not keplar.
I have just waded through a load of posts, from what I can make out the drivers are total animal waste and it does not make any difference if you are using Fermi or Keplar.
Some posts have mentioned volt problems but I have not seen anyone post any evidence to back it up.
I have not noticed any problems in normal gameplay but for benching the whole 320.00 family of drivers are rubbish for multi GPUs. For benching on a single GPU they can work quite well.
Having said that though because of the glitches/freezes people are getting the reasonable thing to do would be to go back to 314.22