4DS - Anything but Charting, page-30753

I started out with DEC Alpha's Main frames in the rack room as it was called and then you had the tape drive racks in a different room.
Worked on several different types of equipment from SUN and Phillips.
The rooms today are still warm and some are quite noisy especially when the processors are at full load and the cabinet cooling working hard.
The heat is not derived from the memory but from the multiple processors running with their own cooling and the cabinet cooling. This along with the huge power supplies that feed the processors and the cooling systems are what consumes the vast amount of power required to drive a data center.