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Nor does the High Power HPC-420-302 DF by Sirtec deliver 420 watts - as might be supposed from the name - but rather a maximum combined power of only 400 watts. Although the Sirtec power supply unit delivers this maximum power level in a test run, it breaks down on the 3.3-volt line - without shutting off.
But the power supply unit works very quietly at 32 to 36 dB(A) - despite having two fans. The cable lengths are adequate, and the connectors are distributed over enough lines. Moreover, the device has a standard direct S-ATA port.