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87 Posts

01-25-2010

Canada

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  • Message 711 of 1217

Re: re: T420s Fan noise Issue

2011-12-05, 14:58 PM

***BIOS 1.29 (1.30 was worse)

 ***PW manager 3.64, driver 1.64 (Lenovo Turbo Boost disabled)

T420s, 4170-CTO, i5 @ 2.5, Nvidia 4200m, 4GB, Pro x64, TP 1x1 bgn, BT, fp reader, Hitachi 320GB @7200rpm. 

 

1. System idling at desktop on AC =3578rpm  DC =3578rpm (fan will not slow down on DC's lowest power mode) 

2. When the system is attached to an external monitor (via nVidia DP) and LCD - 50 degrees at 3578rpm (duplicate display under same load of video @1080i = 55degrees at 3578rpm)

3. When using with two external monitors (via DP and VGA under same load as above) - 55 degrees at 3578rpm

 

Also engineering have asked the following.

 

1. Working environment = quiet room, ventilated cubicle

2. Laptop idle - fan spinning speed = 3578rpm @50degrees (never reaches below 50degrees)

3. Room temp estimate = 22degrees under heavy AC, Caribbean area

5. Laptop temp clocked during that time = 50degrees 

6. Temp software used HWiNFO64 v3.90-1430

 

 

_______________________________________________________
T420s, i5-2520M @2.5, nVidia 4200m, 8GB DDR3, OCZ Vertex 3 Max IOPS 240GB SSD, Hitachi 320GB @7200rpm ulrabay, 8Pro x64
T61, Centrino Duo @1.8, GM965, 4GB PC2-5300 DDR2 @667MHz, OCZ Agility 120GB SSD, 7Pro x64
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49 Posts

08-10-2011

Germany

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  • Message 712 of 1217

Re: re: T420s Fan noise Issue

2011-12-05, 17:12 PM

ON AC

1. Working environment -  normal 

2. Laptop idle - fan spinning speed = 3580 

3. Room temp estimate= 20°C

5. Laptop temp clocked during that time = 50-55°C with external Monitor

6. Temp software used= Core Temp.

 

The main problem that I have sometimes is that the fan comes not korekct down to 3.5k and that he spinns up to 4k even wehn ´watching HD video with CPU temp at 55-60°C

 

With Battery 

 

 

2. Laptop idle - fan spinning speed =2000 (most  

3. Room temp estimate= 20°C

5. Laptop temp clocked during that time = 42-50°C 

 

but 0 fan speed, thats never happend 

 

and now as I doc in an External USB3 Harddrive the fann spins up to 4k at a CPU temp of 48°C and didn't come down (45°C and 4k) :(

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2 Posts

11-22-2011

France

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  • Message 713 of 1217

Re: re: T420s Fan noise Issue

2011-12-05, 17:28 PM

Hi Jamez,

 

1) This is not my case. I always hover around 4k RPM, on AC. When it wakes from sleep it's quiet, but it fires up quickly. Seems ok on battery. But when I plug AC adaptator, fan speeds at 4k RPM after only a few minutes and stay to this speeds until I shutdown or suspend/hibernate even if I unplug AC adaptator

2) I am not attached to an external monitor.

3) Same, I have not done this.

 

For the questions:

 

1) Normal office environment. Quiet room at home.

2) Idles speed - 4k ROM

3) 18-22°C

4) 42-52°C, mostly ~44°C

5) Linux temp sensors (Debian SID kernel 3.1.0-1-amd64, but same with kernel 3.0.0-1-amd64)

 

 

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30 Posts

05-31-2011

Switzerland

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  • Message 714 of 1217

Re: re: T420s Fan noise Issue

2011-12-05, 21:58 PM

funny how this filibuster tactics work out for lenovo, since may they just hide away from the

facts that they just built in a noisy fan.... the units whines and screems above 2000 rpm

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1 Posts

12-06-2011

Townsville, Australia

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  • Message 715 of 1217

Re: T420s Fan noise Issue

2011-12-06, 8:51 AM

Appreicate this feed adn efforts o many to address this issue.

 

Was about to purchase max featured T420s ($2000).However having to put up with fan noise was a kilell to that. So no purchase. 

 

Will waite a while longer in case solution comes up, but eventually will need to pruchase to repalce old laptop.

 

John

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9 Posts

11-16-2011

USA

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  • Message 716 of 1217

Re: T420s Fan noise Issue

2011-12-06, 13:15 PM

Hello,

 

1. System idling at desktop on AC or battery - will usually run fan speeds between 0 and 2k RPM - this is base on several thermal sensor placed on the system board.

 I WISH IT WOULD JUST STAY AT 0 - 2K RPM. ALWAYS STUCK AT 4K RPM NO MATTER WHAT SO EVER.


2. When the system is attached to an external monitor and LCD - this causes increased graphic processing from the system video chips and will cause the fan to run at constant higher speeds - ranging between 2K and 4K RPM

I'm not even using one.


3. When using with two external monitors - the increased video requirements push the thermal profile to keep the fans spinning at highest RPM.

Nope.

 

Also engineering have asked the following.

 

1. Working environment - noisy / normal / quiet room

Quiet in my room most of the time. In fact, I'm a college student and I can't take this laptop to my school's library because it's just so **bleep** noisy.

2. Laptop idle - fan spinning speed

4000 RPM

3. Room temp estimate

21 ~ 24 C

5. Laptop temp clocked during that time

50~55 C - mine hardly drops below 45C

6. Temp software used

 HW monitor

 

I just regret so much that I didn't find this thread before I got my T420s. I would've never bought this from Lenovo. So disappointing compared to my previous T61.

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107 Posts

06-28-2011

Italia

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  • Message 717 of 1217

Re: T420s Fan noise Issue

2011-12-06, 14:05 PM

@JameZ: Can you ask at the engineering team why it seems to work on battery? Can they just use the same algorithm on AC, or at least grasp from that what might be the difference!

 

Assuming that the BIOS does (excuse my pseudo C code, I hope you can understand what I mean):

 

if (on_battery)

     code_that_works;

else if (on_ac)

     complete_disaster;

 

can they try something like:

// No matter what

code_that_works

 

I would gladly test that kind of BIOS assuming any responsibility for stupid results.

 

PS: Please don't leave us in the dark for weeks. Get those engineers back to work on this issue!

 

 

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163 Posts

07-02-2011

USA

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  • Message 718 of 1217

Re: T420s Fan noise Issue

2011-12-06, 17:32 PM

wrote:

Hello,

 

1. System idling at desktop on AC or battery - will usually run fan speeds between 0 and 2k RPM - this is base on several thermal sensor placed on the system board.

 I WISH IT WOULD JUST STAY AT 0 - 2K RPM. ALWAYS STUCK AT 4K RPM NO MATTER WHAT SO EVER.


2. When the system is attached to an external monitor and LCD - this causes increased graphic processing from the system video chips and will cause the fan to run at constant higher speeds - ranging between 2K and 4K RPM

I'm not even using one.


3. When using with two external monitors - the increased video requirements push the thermal profile to keep the fans spinning at highest RPM.

Nope.

 

Also engineering have asked the following.

 

1. Working environment - noisy / normal / quiet room

Quiet in my room most of the time. In fact, I'm a college student and I can't take this laptop to my school's library because it's just so **bleep** noisy.

2. Laptop idle - fan spinning speed

4000 RPM

3. Room temp estimate

21 ~ 24 C

5. Laptop temp clocked during that time

50~55 C - mine hardly drops below 45C

6. Temp software used

 HW monitor

 

I just regret so much that I didn't find this thread before I got my T420s. I would've never bought this from Lenovo. So disappointing compared to my previous T61.



Hello sohn1392,

 

What operating system are you running?

 

If your temperature is stuck at 50-55C even though the fan is stuck at 4000RPM, I think you have an overheating problem, not a fan speed problem. People experiencing the fan speed problem are seeing their temperature stuck at 34-35C and the fan still won't slow down.

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162 Posts

06-16-2010

West Lafayette, IN, USA

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  • Message 719 of 1217

Re: T420s Fan noise Issue

2011-12-06, 19:26 PM

wrote:
If your temperature is stuck at 50-55C even though the fan is stuck at 4000RPM, I think you have an overheating problem, not a fan speed problem. People experiencing the fan speed problem are seeing their temperature stuck at 34-35C and the fan still won't slow down.

Yea for a load temp that might be normal but for idle that's quite a bit on the high side...


I'm also a college student as well and the T420s makes for a good laptop to carry around in your bag form-factor wise but I dare not plug it in at a library or something cuz then come the 4000rpms once I start doing anything.  It seems fine on battery though and I don't like lugging my adapter around much anyway.

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162 Posts

06-16-2010

West Lafayette, IN, USA

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  • Message 720 of 1217

Re: T420s Fan noise Issue

2011-12-06, 19:40 PM

Just for reference it seems our friends in the X220 thread have obtained part numbers for the X220 fan:

http://forums.lenovo.com/t5/X-Series-ThinkPad-Laptops/X220-fan-constantly-on-revving-up-and-down/td-p/425965/page/90

The X220 fan is made by Delta Electronics Inc. in China.  I believe the T61 fans that everyone says are good were made by Toshiba.  Ultimately the fan rpm is determined by the EC but it could probably be quieter at 4000rpm if they used higher end fans as well.

 

Also previously I had said that I haven't gotten stuck at 4000rpm on battery for a while....nvm about that I just noticed it was stuck at 4000rpm while I was writing this thread...CPU is running at idle 800Mhz and sitting at 35C according to HWINFO.

Power Manager is 3.64, BIOS is 1.29, System performance = balanced, and optimize fan control set to balanced as well.

 

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