French tech site CowCotLand checked out 13 power supplies with a wattage between 400W and 600W.
The best units in the test are the Seasonic X460, Super Flower Golden King 550W and FSP Aurum 500W.
"Food is now an essential component in a PC. Its primary purpose is to provide the current necessary for your machine. Today we open a new comparative therefore blocks, which will attempt to verify the performance and stability of power supplies from 400 to 600 watts. Blocks less powerful than in our comparison from 650 to 1000 watts, but it is clear that everyone does not necessarily need as much power. Zalman ZM500 after ST-watt Seasonic X-460 and FL BeQuiet E7 Straight Power 580 watts, Xilence XP-420, Xilence XQ 500, HuntKey Jumper 550, OCZ Stealth X Stream II 600, BeQuiet Straight Power 580 and E8 Rasurbo ANPR 550, Golden Flower Super King 550 watt, Thermaltake ToughPower 575 watt XT and FSP 500 watt Aurum we add today the Cooler Master GX 450. "