Speed reduction

Input.Mode.....: Mask (?d?d?d?d?d?d?d?d?d?d?d?d?d111) [16]
Speed.GPU.#1...:  2877.0 MH/s

Input.Mode.....: Mask (111?d?d?d?d?d?d?d?d?d?d?d?d?d) [16]
Speed.GPU.#1...:   611.1 MH/s