As a result of this change, the individual PC boards grew about square to about . This doomed Burroughs' efforts to produce a thin-film memory for the machine, because there was now no longer enough space for the memory to fit within the design's cabinets. Attempts to increase the size of the cabinets to make room for the memory caused serious problems with signal propagation. Slotnick surveyed the potential replacements and picked a semiconductor memory from Fairchild Semiconductor, a decision that was so opposed by Burroughs that a full review by ARPA followed.