Mugen 2 Cooling Fan at a constant 200RPM?

[Bluescreendeath]

Hi there,
For some reason, my Scythe Mugen 2's main 120mm scythe fan is only reading 200RPM in HWmonitor.

I'm using an i7 920, and even during times of load (temps go to around 65'C), the fan speed fluctuates between 175 rpm and 210 rpm.

I thought the fan was suppose to go up to 3000RPM? Anyways, I have it plugged into my mobo (Intel DX58SO), while my other fans are plugged into the power supply.


Is this a fan error, or am I somehow not reading HWmonitor correctly? (maybe it's the mobo chipset fan?)



Btw, are my idle temps a bit high for the Mugen2? It's 72'F in the room, and I've heard the i7 idles at mid 30s with stock.

 

[Conumdrum]

What does the bios have for fan settings?

 

[f16boiler]

Hi there,
For some reason, my Scythe Mugen 2's main 120mm scythe fan is only reading 200RPM in HWmonitor.

I'm using an i7 920, and even during times of load (temps go to around 65'C), the fan speed fluctuates between 175 rpm and 210 rpm.

I thought the fan was suppose to go up to 3000RPM? Anyways, I have it plugged into my mobo (Intel DX58SO), while my other fans are plugged into the power supply.


Is this a fan error, or am I somehow not reading HWmonitor correctly? (maybe it's the mobo chipset fan?)

[url]http://img21.imageshack.us/img21/2565/wutz.jpg[/URL]

Btw, are my idle temps a bit high for the Mugen2? It's 72'F in the room, and I've heard the i7 idles at mid 30s with stock.

What you really should be concerned with is load temps. What you have listed seems a pretty good too me but there are a ton of things that go into your CPU temps. Case, other fans, etc. I have a mugen 2 and dropped my case temps 10 C (@ load) by replacing my case fans. I get around the same as you are at load. Before my case fan replacement I was getting 65 C @ load stock.

 

[Bluescreendeath]

I have an Apevia Sniper-G case that comes with 3 120mm fans. (2 intakes and 1 outtake)

I replaced two of the native LED 120mm fans with 2 Cooler Master fans that is suppose to be quiet ~21dba and have 69 CFMs in airflow. (It's one of those 9 bladed fans)

Also, because the Mugen2 is so frekin huge, I had to replace my thicker 120mm side can with one of those very thin (half width) 120mm fans. (which I believe has far less airflow)

I also have filters on my intake fans, so that probably reduces the airflow as well. (as well as 3 HDDs blocking the front intake fan)

Overall, I don't think it's a case fan issue...it's not great, but it is sufficient. I just don't know why my Mugen2 fan only spins at 200RPM.

 

[Bluescreendeath]

Btw, as for my idle temps...perhaps I applied too much thermal paste? Is this idle temp normal for Mugen2s (I couldn't look up that many online with comparable systems)


Should I reassemble my entire PC and reapply the thermal paste?

 

[Bluescreendeath]

rawr

 

[kokin]

There's no need to reassemble your whole PC, but make sure you did install the HSF correctly. It shouldn't move at all aside from the weak mounting.

What thermal paste are you using? If it's Arctic Silver 5, give it a week or two to burn in, and you'll definitely see the difference. All you need is about the size of 2 grains of rice and you can spread it out with an old credit card or something similar.

As for the Mugen 2, it actually only goes up to 1300 RPM, even says so on the box. Check your BIOS setting for smart fan control and turn it off, if it's on. Otherwise, try using another program like Speed Fan to manually increase the fan speed.

This is just with a single stock Scythe Mugen 2 fan.

Edit: Oh and depending on the room temps, I usually get low-mid 30C to low 40C for stock settings on my PII 955.

 

[rodney_ws]

I think I could visually look at a fan and tell if it was spinning at that low of a speed... 200 rpm would be just over 3 revolutions per second... I think my eyes could see the blades going around if it were really that low of a speed. Have you just looked at the fan while it's powered up?

 

[Bluescreendeath]

Ok, I'mma try out your suggestion.

Although it's strange that even with smart-fan on, it doesn't even go above 200RPMs during load.

Also, is your 29'C cpu picture with an i7 920 or Phenom2?


The Mugen2 is the type of cooler that is attached from the bottom of the motherboard...so you basically need to reassemble everything if you want to tighten it. But I checked and the HSF is perfectly firm.

 

[Bluescreendeath]

Ok, so I disabled auto-fan in BIOS. The fan spins at a constant ~1150RPM now. The idle temperature has fallen by approximately 4'C

It makes me curious that at what temperature does the CPU need to be for the fan on auto to actually kick in and start spinning at top speed... >_>

 

[kokin]

Phenom 2, but yeah when I was researching for a good CPU cooler I saw a lot of people having the auto-fan problem. The mobo isn't perfect at detecting things, so you'll have to manually tweak things if something is wrong.

 

[Conumdrum]

kokin, best answer, yes you do, lots of times the bios temp measurements need tweaking, just work it till it's right so you got quiet browsing temps and better temp management at high gaming loads etc.

BSG, play with your bios options you'll get it.

 

[kokin]

I was happy that my mobo has a clear cmos button, so if I ever mess up with my settings I can just go back to the default and reload any saved settings in the past. Cheers for the people who thought of putting buttons on the mobo.

 

[Bluescreendeath]

Yep, so I'm just playing around with the settings...I'm a bit disappointed I can't adjust the CPU fan speed. =/

 

[kokin]

You can with Speed Fan, but the stock fan still caps at 1300RPM, which is still silent.

A lot of people like to put the slipstreams with 100+CFM here, but it is VERY loud.

 

[Bluescreendeath]

I could never get Speed Fan to properly change the speed of my CPU fans or my case fans on my 2ndary computer.

It's sometimes go to my intended RPM, but reverts back to max a few minutes later...

 

[carpand]

Speed fan works great it just takes some time to configure.. For example, go to the big "configure" button on the right, and change the fan speed %'s and desired temps for all components.. took me a while when I first started to tweak it but now that I got it set up I love it.

But for some people it unfortunately just has problems =( hopefully that isn't you so you don't miss out on a great tool.