On January 30, 2017 they released New core 21 v.0.0.18 to full FAH. The updated core will be pushed out automatically for both Windows and Linux donors over the next few weeks as projects are updated to require this min-core-version.
This release contains a workaround for a change made in the NVIDIA OpenCL driver introduced in drivers starting with 375.57. as well as improvements to error handling codes.
While a slight reduction in performance may be observed, this performance regression will be eliminated when NVIDIA removes the hotfix in forthcoming driver updates.
My advice would be do a clean OS install and use most current NVIDIA Drivers.
Same advice for rig 2, do a clean OS install and use most current AMD drivers.
Edited by Braegnok, 15 February 2017 - 05:01 AM.