- Jul 12, 2020
I received this Flex-ATX Delta DPS-350AB-12 A 350W 80 Plus Silver PSU, and did some preliminary testing for trying to evaluate noise levels of the 15x40 mm PSU fan. My test platform is an APU-Build/InWin Chopin/ASRock B450/Ryzen5-3400G/150W-PSU with the Chopin-150W-PSU unplugged and the Delta-350W plugged in its place. The 350W-PSU-fan starts with a howl at full speed each time the AC/wall-power is disconnected and then slows for a moment and then forever shuts off after the initial burst of fan speed.
- The PSU-fan starts with a howl at full speed each time the AC/wall-power is disconnected
- After the initial full fan speed startup the fan shuts off completely
- The fan remains shutoff for subsequent startups unless the AC/wall-power is disconnected again
- The PSU was only mildly warm when touched with your hand, but after my normal use for an hour or so it is more than mildly warm but still not hot.
The cable from the 15x40 mm fan is a 3-pin cable (Red, Black, Blue) that plugs into a 3-pin fan receptacle on the PSU-PCB/Printed-Circuit-Board (see pictures). So I am guessing that this PSU has its own built-in fan speed control?
Maybe the PSU is just not hot enough to require the fan? I tried a mild stress test using Asus RealBench to heat-up the 3400G-CPU to 75c. If the fan only needs to run at slow speeds (OR OFF) for my APU-Build then that would be great!! I wouldn't even consider doing a fan mod for excess fan noise. But I don't know for sure if that is the situation? Maybe I need to try heating it up with a Prime95 stress?
Anyone have experience with these server PSUs? Is fan shutoff normal for my APU-Build?