The answer is the CU-700. The CU-700B which we will be reviewing today is aimed at the individual's that don't want to fork out $100 plus for a power supply. The same individual that do not even need 600 watt but wants the insurance when the time to upgrade comes along. The CU-700 fits this individual to a tee. The Cu-700 not only boasts 700 watts of power but does it at a price that any can afford. At $60 the CU-700 will not break the bank. The same individual would also like the fact the low cost unit is 80% efficient.