because of its integration with the JJ's hash monitor. I never figured out the cast xmr;s UI that sets hash rate thresholds.
anyway I did use cast xmr and got similar hashrate. Not sure where the problem is. Using win 10 1709
Monitor you clocks/volts/temps using HWInfo64. What are your GPU settings. Are you using OverdriveNtool or something else? post the profile you're trying to use.