We review many power supplies, but its always a treat to get a new SFX unit into our labs for analysis. Today we take a look at the be quiet! SFX L, now available in 550W and 600W capacities. be quiet! have been behind many 80 Plus Bronze rated SFX power supplies in the past, but this new model is 80 Plus Gold rated and fully modular ? a welcome addition to the line up for 2017.