Thinkpads Forum

Posted: **Sun Sep 27, 2015 12:23 am**

Good morning everyone

I`m Luca.

My lenovo is t430s 2356 GCG

Intel i7 16 Gb ram HD 4000 SSD intel 180 Gb.

I check the temperature of the CPU with real temp.

Idle temp 42`C

Ful load temp is 95`C.

Is normal?

Thank You

Posted: **Sun Sep 27, 2015 2:23 am**

the load temp. is a bit high.

Posted: **Sun Sep 27, 2015 2:32 am**

I get spikes to 95C in full load on my CPU in T430 as well. The CPU is made to withstand 105C, but it will never reach such temperature, as it will throttle down if needed (I think it happens around 95C too). I think from what I've seen what happens to my laptop is that when it reaches about 95C, then the turbo boost is disabled and in consequence it never gets beyond that point.

Posted: **Sun Sep 27, 2015 3:27 am**

OK,

thank you.

it is true, when the temperature reaches 98C and the clock decreases immediately.

Best regards

Posted: **Sat Jul 09, 2016 11:01 am**

I believe something is wrong with my T430s but I'm now sure how to fix it. This T430s idle temperature seems to be hovering around 46C-51C. Oddly enough, I haven't seen it go much above that even when running under a higher load like compiling software or playing HD video. The fan speed does go up under higher loads though. This temperature seems to high to me. Any suggestions on getting it down? I feel like it should be at 35C max idle.

I see this 46C-51C idle temp in Windows and Linux. I've tried turning on/off various Power and CPU features in the BIOS but nothing changes. At this high idle temp the fan is in the audible range, ~3000RPM. Under light load it goes up to 4000RPM but I don't see the CPU temps go up that much, only to about 60C peak.

I have two other ThinkPad in the same room with idle temperatures 30C-35C and their fans speed at such a load speed I can't really hear them in a quiet bedroom. I haven't checked the speeds but I'm guessing those are around 2000RPM because I have to put my ears next to the vents just to hear anything.

I got this T430s used so I'm not sure of the history of the machine. The only things I can think of to do a this point are:
- Clean the vents better. I've cleaned them already but there's still a little dust. I have an older ThinkPad with way more dust that runs about 32C in the same room however.
- Change BIOS versions. I've seen people report different temperatures with different BIOSs.
- Apply new HSF and thermal paste. This will likely be my last resort.

Basics:
T430s
Core i7-3520M @ 2.9GHz
16GB RAM
SATA disk drive (not SSD)

sensors output:

Code: Select all

$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:        +46.0°C  (crit = +103.0°C)

thinkpad-isa-0000
Adapter: ISA adapter
fan1:        3064 RPM

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +48.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +49.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +42.0°C  (high = +87.0°C, crit = +105.0°C)

After running with a little load for a while:

Code: Select all

$ cat /proc/acpi/ibm/fan
status:		enabled
speed:		3592
level:		auto
commands:	level <level> (<level> is 0-7, auto, disengaged, full-speed)
commands:	enable, disable
commands:	watchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))

i7z output snapshot:

Code: Select all

Cpu speed from cpuinfo 2893.00Mhz
cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc
Linux's inbuilt cpu_khz code emulated now
True Frequency (without accounting Turbo) 2893 MHz
  CPU Multiplier 29x || Bus clock frequency (BCLK) 99.76 MHz

Socket [0] - [physical cores=2, logical cores=4, max online cores ever=2]
  TURBO ENABLED on 2 Cores, Hyper Threading ON
  Max Frequency without considering Turbo 2992.76 MHz (99.76 x [30])
  Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is  36x/34x/34x/34x
  Real Current Frequency 1701.53 MHz [99.76 x 17.06] (Max of below)
        Core [core-id]  :Actual Freq (Mult.)	  C0%   Halt(C1)%  C3 %   C6 %   C7 %  Temp	 VCore
        Core 1 [0]:	  1701.53 (17.06x)	6.93    17.2    3.14    1.14    74.4    55	0.8206
        Core 2 [2]:	  1682.61 (16.87x)	5.42    12.5	   1	   0    83.3    48	0.8206





C0 = Processor running without halting
C1 = Processor running with halts (States >C0 are power saver modes with cores idling)
C3 = Cores running with PLL turned off and core cache turned off
C6, C7 = Everything in C3 + core state saved to last level cache, C7 is deeper than C6
  Above values in table are in percentage over the last 1 sec
[core-id] refers to core-id number in /proc/cpuinfo
'Garbage Values' message printed when garbage values are read
  Ctrl+C to exit

I'm still wading through all the info out there about ThinkPad T430s (and similar machines) and their temperatures. I'll update this post or thread if I come across new and useful information. Thanks.

Posted: **Sat Jul 09, 2016 11:39 am**

crystal castle wrote:The only things I can think of to do a this point are:
- Clean the vents better. I've cleaned them already but there's still a little dust.
- Apply new HSF and thermal paste. This will likely be my last resort.

Do these immediately.

crystal castle wrote:- Change BIOS versions. I've seen people report different temperatures with different BIOSs.

Don't bother.

Posted: **Sat Jul 09, 2016 9:27 pm**

Hm, I was afraid of that. I've torn down plenty of laptops in my day and I've already done the FullHD LCD mod on this particular computer (I'm sure the high temp issue was there before the mod), but thermal paste always leaves me a little worried because it's hard to know how well a job you've done before it's too late. But I'll give a shot. Thanks!

Posted: **Sun Jul 10, 2016 7:06 pm**

I replaced the thermal paste and did a through cleaning of the HSF, I didn't actually replace the HSF because I need this laptop to do some work and couldn't wait for a new HSF to arrive again. The CPU is still running hot, 47C for one CPU and 41C for the other. I know the new paste needs some time to "cure" or whatever but considering the idle CPU temp is about 40% above what it should be I think this machine is a dud.

Posted: **Sun Jul 10, 2016 10:00 pm**

I updated to the latest BIOS. No changes in the temperature situation. At this point I'm giving up on the CPU idle temperature and focusing on the fan speed. Unfortunately I can't figure out how to lower the speed below ~2500RPM. I'd like to go as low as 2000RPM but either the embedded controller in charge of the fan doesn't go that low or I haven't yet come across the right information to get it that low.

When I try:

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echo "level 1" | sudo tee /proc/acpi/ibm/fan

I can get as low as 3000RPM.
When I do:

Code: Select all

echo "level 0" | sudo tee /proc/acpi/ibm/fan

I can get to about 2500RPM, which isn't quite low enough.

I thought that anything above "level 7" puts the EC into some kind of manual mode. But when I try "level 9" I get an error message and nothing changes.

I'm aware that lowering that manually controlling the fan speed can be dangerous but I'm willing to accept the risk considering my usage model, operating environment and manufacturer recommended thermal limits.

Posted: **Sun Jul 10, 2016 10:33 pm**

40-50C sounds like a fine CPU idle temperature to me. Since T430s is a really thin laptop, the subsequently smaller heatsink (smaller than on a slightly thicker but still thin T61, or a thick W520, or a thick R series) may be why the idle temperatures are higher than on other Thinkpads.

Posted: **Mon Jul 11, 2016 6:45 am**

OK, makes sense. I'll just keep looking or ways to drop the fan speed to 2000RPM temporarily then.

Posted: **Sun Jul 17, 2016 3:19 pm**

I've been asking around and crawling the web for hints on this. It looks like the T430s just runs a bit hotter than the other laptops. I guess that's due to the CPU being used? Do other systems with the Core i7-3520M 2.9GHz have a similar problem? Are there quieter fans?

Posted: **Sun Jul 17, 2016 3:27 pm**

The 's' models are thinner and use different heatsinks, so they will run a little hotter.

Posted: **Mon Jul 18, 2016 9:57 am**

Makes sense.

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