YS Tech TMD fan ... rpm

[theREALSiren]

I just bought the TMD 70mm
[33dba] [30cfm] [4500rpm]

but for some reason ... its reading at around 8600rpm in motherboard monitor [reads the same in bios setup]

and I made sure none of the metal parts of my hs (Thermalright SLK-800) were touching ...

does anyone know why its reading the rpm that high?
is it really going that high?

 

[farmercal]

I don't see how the fan could run almost twice as fast as the rated speed by the manufacturer. Is it extremely loud? Because if it when a fan runs at 5000RPM it is extremely loud. If you don't have a noise problem then I would suspect that the reading is wrong although I have not idea why it would read wrong in the BIOS also. Perhaps it is in the fan shroud.

 

[theREALSiren]

its not loud ... other than that i'm just as stumped

 

[farmercal]

If it is not loud then I would think that it is running at the posted RPM. Perhaps someone else might have a clue as to why the reading is doubled.

 

[Poohbee]

Boo...! I wrote out an explanation of why the rpm is so high but the server gave me a 404 error when i tried to post and I lost everything.. so now I'll just post a simpler version of it.

Basically it has to do with the technology used by the TMD fans. The signal sent to the motherboard is being read wrong by the onboard sensor on the motherboard because of those Tip Magnetic devices. It's nothing to worry about. It won't fly off or burn out or anything. If you set up Motherboard monitor correctly and set up the fans option correctly you should be able to read the correct rpm. I have the higher rpm TMD fan and it used to read 12,000 rpm but now it reads around 5100.

Hope this helped.

 

[theREALSiren]

haha okay ... i was just getting a little nervous ... cause somewhere i read that these babies are a fire hazard???

 

[ChefJoe]

Some people have had problems with using the screw holes. The magnets are at those corners, with teh screw hole going right through them, and they were cheap with the insulation so that the metal cover may be tightened down onto the coil of the magnet. Some recommend putting something like electrical tape underneath the metal cover at the corners.

I have a 4500 rpm version, had the same counting problem in MBM, then I adjusted the divider on MBM to have the fan read correctly.

 

[theREALSiren]

what are you divider settings if i may ask?

 

[ChefJoe]

the tmd fan: fan type /2, fan divider, 4 other fans I have as fan type /1

 

[theREALSiren]

got it it shows up as 4800rpm now .. thanks!