A pixel space is narrowed without increasing PN junction capacitance. Further provides power and energy consumption and workload management and control systems and architectures for high-density and modular multi-server computer systems that maintain performance while conserving energy and method for power management and workload management. In certain implementations, the variable gear includes one or more teeth with varying tooth radii. A manifold underlies the platen and has a number of separate chambers open to the platen, so that the suction device is connected to each of the chambers.