Someone had suggested to me to start up 2 separate clients to get GPU usage up. It was at 82%. Doing the 2 clients did bump GPU usage to 94%. Even though they both saying they're doing some ridiculous amount khps... I'm still submitting the same # of shares as I did with just 1 client going.
my full share value per block went up 30% at that time. It may not hold and then again it may be hard to confirm without identical rigs as a control. But I did also notice an increase of 125 watts on my KillAWatt. So more power is being used for sure.