Hey xaqfields, I just realized you are running cudaPPSsieve on your computers. Perhaps you should try switching to OpenCL, it's usually up to 20% faster than CUDA. Install Nvidia drivers with OpenCL support from here and BOINC should automatically request OpenCL work then.

Similar story here:
https://www.reddit.com/r/gridcoin/comments/6fdn0k/checking_to_see_if_my_earnings_are_on_par_with

EDIT: Nah, it appears Open CL isn't supported for PPS Sieve on Nvidia, just for GFN. Too bad, it woud probably yield better performance. Something to look ahead for.