 The 1955 machine had a total of 200 point-contact transistors and 1300 point diodes, which resulted in a power consumption of 150 watts.There were considerable reliability problems with the early batches of transistors and the average error-free run in 1955 was only 1.5 hours.The Computer also used a small number of tubes in its clock generator, so it was not the first "fully" transistorized machine.