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RM750 fan problem


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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?

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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

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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.
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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.

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