In summer 2006 I've reviewed a high-end PSU from Thermaltake; nonmodular Toughpower 750W. Just about two months ago we've been given an opportunity to check out two power supplies from Listan; be quiet! Straight Power 450W and 600W. Today we make a comeback and bring you high-wattage juice makers from both Listan and Thermaltake. These two are definitely not your regular power supplies you'd use for your grandmothers' computer. Although you can already buy 1.2kW (1200W) power supplies these 850W generators can take everything you throw at them -- it just a matter how stable they are.