Thanks I will give that a try...  I have 4 different miners... this is the only one that does this.. although others have also been very unstable latetly, Crashing the Scrypt jane miner and requiring a re-boot very frequently !

I had been experimenting with my tuning during and found that I could clock down the memory to 800MHZ  from 1500 without a decrease in performance just an FYI for everyone out there !  Also powertune does not increase performance from 0 to +20 does not increase hashing performance.

Cheers,