Fiskpåland Posted February 22, 2021 Share Posted February 22, 2021 So there seems to be a problem with my PSU. It's a RM750 and i would say the problem is fan related. It is either off under no load or full throttle under load. It is not ramping up with the load its just spinning at 100% or not at all, also it does not ramp back down afterwards I have to shut the system down. I know that it is supposed to be off under no load, cause I can't believe it is meant to be at full throttle when there noting putting a big load on the system. So my question then would be is this something wrong with the unit or am I just being stupid and missing something? Link to comment Share on other sites More sharing options...
Corsair Employees Corsair Mordred Posted February 23, 2021 Corsair Employees Share Posted February 23, 2021 Hi Fiskpaland Are you using the RM750x/RM750 or the RM750i? You're correct in that these PSUs have a Zero RPM mode -- hence it not spinning. For the RM750x/RM750 the fan curve is not configurable; so there's really not much else I can suggest here - as the fan is running. Let me know if it's an RM750i, and I can look into a couple of other suggestions ~Mordred Link to comment Share on other sites More sharing options...
Fiskpåland Posted February 23, 2021 Author Share Posted February 23, 2021 It's a RM750. Also, should probably mention it's a brand new unit, so this is not a problem that happened over time it was like this out of the box Link to comment Share on other sites More sharing options...
Corsair Employees Corsair Mordred Posted February 23, 2021 Corsair Employees Share Posted February 23, 2021 Hi It isn't a software controllable unit, it will be on/off for the most part. Are you just concerned regarding the RPM or are there extra noises? ~ Mordred Link to comment Share on other sites More sharing options...
Fiskpåland Posted February 23, 2021 Author Share Posted February 23, 2021 Well yes, its spinning at what I am assuming 100%, it sounds like a fighter jet and the fan curve on the box it came in is not 0% or 100%. It's supposed to be gradual right. ramping up with the load of the system Link to comment Share on other sites More sharing options...
Corsair Employees Corsair Mordred Posted February 23, 2021 Corsair Employees Share Posted February 23, 2021 Hi Fiskpaland It definitely shouldn't sound like a fighter jet Send us an email at https://help.corsair.com with a recording of the "fighter jet" PSU and we'll see what else can be done to assist. ~ Mordred Link to comment Share on other sites More sharing options...
LeDoyen Posted February 23, 2021 Share Posted February 23, 2021 If the PSU is installed with the fan pointing down, you can get it to work a bit cooler by installing it fan up (heat will rise away from the PCB in passive mode instead of keeping the PCB hot when the fan is pointing down). That makes it run passive for longer, and the case fans help cool the PSU without needing its fan to run as often. Link to comment Share on other sites More sharing options...
Fiskpåland Posted February 23, 2021 Author Share Posted February 23, 2021 If the PSU is installed with the fan pointing down, you can get it to work a bit cooler by installing it fan up (heat will rise away from the PCB in passive mode instead of keeping the PCB hot when the fan is pointing down). That makes it run passive for longer, and the case fans help cool the PSU without needing its fan to run as often. I have it installed face up, facing down was way worse than it is now but its still very bad. Link to comment Share on other sites More sharing options...
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