Patent ID: 8482925

Claim:
A high-density computer system, comprising: a chassis, having a plurality of containing spaces, a main backplane installed in the chassis, and a main control circuit and a plurality of main backplane slots installed and formed on the main backplane respectively; at least one expansion card module, inserted into the containing space, and including a sub-backplane fixed into a position by a lower panel and a front panel, and the sub-backplane further including a sub-control circuit and a plurality of second sub-backplane slots, wherein the second sub-backplane slots are disposed and formed on the lower panel horizontally and the front panel includes at least one display window electrically coupled to the sub-control circuit; and a first sub-backplane slot formed at an end corner of the sub-backplane on the lower panel and corresponding to the main backplane slot; and a plurality of CPU cards, installed onto the expansion card module, and inserted vertically and correspondingly coupled to the second sub-backplane slots respectively, and a CPU is installed on each CPU card; wherein the at least one expansion card module slides into the containing space by the lower panel through a rail located on a bottom wall of the chassis.