The rear part enhances the cubic outlook of the G69T, that is 370mm. high, 400 mm. long, and 400 mm. wide, it weights 18 Kg. The motherboard placed horizontally allows to  carry big and heavy CPU cooler. A 120x120 mm. cooling  fan  had  been  put  In  the upper right part of the case,  this fan blows out the air coming from the lower openings.