A parallel computer comprises a plurality of compute nodes organized into at least one operational group for collective parallel operations. The coolant supply manifold includes a pair of supply manifold sections and a supply coupling section coupling upper portions of the pair of supply manifold sections together. The ridge portion of the mold cavity is formed by both the first and second mold components abutting each other at the apex of the ridge portion of the mold cavity along a mold line oriented at an angle to a central axis of symmetry of the mold apparatus. The auxiliary signal processing system is separate from the reception signal processing system and has the same configuration as at least a part of the reception signal processing system having a low operation speed. This invention also relates to a memory access monitoring device.