High CPU Temp

[QC91]

HI, I noticed a High CPU Temp of 154 °F 68 °C with Folding Client I have Version 7.4.4 my CPU Usage is at 52% to 56% I have a Intel Core i7 4790 using Windows 7 Professional 64-bit SP1 with NVIDIA Quadro K620 it a brand-new computer here is a data Speccy any help would be appreciated

Thanks

CPU
Intel Core i7 4790
Cores 4
Threads 8
Name Intel Core i7 4790
Code Name Haswell
Package Socket 1150 LGA
Technology 22nm
Specification Intel Core i7-4790 CPU @ 3.60GHz
Family 6
Extended Family 6
Model C
Extended Model 3C
Stepping 3
Revision C0
Instructions MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, NX, VMX, AES, AVX, AVX2, FMA3
Virtualization Supported, Enabled
Hyperthreading Supported, Enabled
Bus Speed 99.8 MHz
Stock Core Speed 3600 MHz
Stock Bus Speed 100 MHz
Average Temperature 155 °F
Caches
L1 Data Cache Size 4 x 32 KBytes
L1 Instructions Cache Size 4 x 32 KBytes
L2 Unified Cache Size 4 x 256 KBytes
L3 Unified Cache Size 8192 KBytes
Cores
Core Speed Multiplier Bus Speed Temperature Threads
Core 0 3791.0 MHz x 38.0 99.8 MHz 155 °F APIC ID: 0, 1
Core 1 3791.0 MHz x 38.0 99.8 MHz 162 °F APIC ID: 2, 3
Core 2 3791.0 MHz x 38.0 99.8 MHz 151 °F APIC ID: 4, 5
Core 3 3791.0 MHz x 38.0 99.8 MHz 153 °F APIC ID: 6, 7

[bruce]

Welcome to foldingforum.org, QC91

Fpr a C{I. 68 °C is pretty warm but not outlandishly so, although GPUs often designed to run above that temperature. Any well designed computer should be able to dissipate whatever heat is generated when the CPU continuously at 100%. Over time, dust can accumulate in the fan/heat-sink areas and the temperature will rise, but you said the computer was new. The thermal compound between the CPU and the HS may be of low quality or may have been poorly applied. If the GPU was added after the computer was originally, it may have trouble dissipating the heat unless the GPU is a 2-slot design that blows hot air out the back of the case.

[QC91]

HI, Thanks I will confirm about the GPU slot, also the NVIDIA Quadro K620 temp is only at 105 F when running folding


Thanks again

[bruce]

You asked about a CPU, so my comment about the GPU took us off-topic, perhaps unnecessarily so.

(GPU) ... temp is only at 105 F when running folding

There a differences between WUs from different Projects so I wouldn't count on that being a maximum ... but there's a lot of margin. Also, with the default settings in V7 client, the GPU only folds when your computer is idle ... mouse and kb are not being used ... so that information might be hidden by a blank screen or a screensaver.

tCaseMax for the Core i7-4790K is 72°C. It also has TurboBoost which regulates the temperature by adjusting the clock rate.

[QC91]

HI, thanks I added the GPU temp to demonstrate it's the normal ranges and that the case fans and GPU fans are working also have the Folding on "While I'm working" here is the log

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*********************** Log Started 2015-02-22T03:17:42Z ***********************
03:17:42:************************* Folding@home Client *************************
03:17:42:      Website: http://folding.stanford.edu/
03:17:42:    Copyright: (c) 2009-2014 Stanford University
03:17:42:       Author: Joseph Coffland <joseph@cauldrondevelopment.com>
03:17:42:         Args: --open-web-control
03:17:42:       Config: C:/Users/SC/AppData/Roaming/FAHClient/config.xml
03:17:42:******************************** Build ********************************
03:17:42:      Version: 7.4.4
03:17:42:         Date: Mar 4 2014
03:17:42:         Time: 20:26:54
03:17:42:      SVN Rev: 4130
03:17:42:       Branch: fah/trunk/client
03:17:42:     Compiler: Intel(R) C++ MSVC 1500 mode 1200
03:17:42:      Options: /TP /nologo /EHa /Qdiag-disable:4297,4103,1786,279 /Ox -arch:SSE
03:17:42:               /QaxSSE2,SSE3,SSSE3,SSE4.1,SSE4.2 /Qopenmp /Qrestrict /MT /Qmkl
03:17:42:     Platform: win32 XP
03:17:42:         Bits: 32
03:17:42:         Mode: Release
03:17:42:******************************* System ********************************
03:17:42:          CPU: Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
03:17:42:       CPU ID: GenuineIntel Family 6 Model 60 Stepping 3
03:17:42:         CPUs: 8
03:17:42:       Memory: 7.94GiB
03:17:42:  Free Memory: 3.62GiB
03:17:42:      Threads: WINDOWS_THREADS
03:17:42:   OS Version: 6.1
03:17:42:  Has Battery: false
03:17:42:   On Battery: false
03:17:42:   UTC Offset: -8
03:17:42:          PID: 19916
03:17:42:          CWD: C:/Users/SC/AppData/Roaming/FAHClient
03:17:42:           OS: Windows 7 Professional
03:17:42:      OS Arch: AMD64
03:17:42:         GPUs: 1
03:17:42:        GPU 0: NVIDIA:4 GM107 [Quadro K620]
03:17:42:         CUDA: 5.0
03:17:42:  CUDA Driver: 6050
03:17:42:Win32 Service: false
03:17:42:***********************************************************************
03:17:42:<config>
03:17:42:  <!-- Slot Control -->
03:17:42:  <power v='light'/>
03:17:42:
03:17:42:  <!-- User Information -->
03:17:42:  <user v='QC'/>
03:17:42:
03:17:42:  <!-- Folding Slots -->
03:17:42:  <slot id='0' type='CPU'/>
03:17:42:  <slot id='1' type='GPU'/>
03:17:42:</config>
03:17:42:Trying to access database...
03:17:42:Successfully acquired database lock
03:17:42:Enabled folding slot 00: READY cpu:4
03:17:42:Enabled folding slot 01: PAUSED gpu:0:GM107 [Quadro K620] (waiting for idle)
03:17:42:WU02:FS00:Starting
03:17:42:WU02:FS00:Running FahCore: "C:\Program Files (x86)\FAHClient/FAHCoreWrapper.exe" C:/Users/SC/AppData/Roaming/FAHClient/cores/web.stanford.edu/~pande/Win32/AMD64/Core_a4.fah/FahCore_a4.exe -dir 02 -suffix 01 -version 704 -lifeline 19916 -checkpoint 15 -np 4
03:17:42:WU02:FS00:Started FahCore on PID 17224
03:17:42:WU02:FS00:Core PID:31180
03:17:42:WU02:FS00:FahCore 0xa4 started
03:17:42:WU02:FS00:0xa4:
03:17:42:WU02:FS00:0xa4:*------------------------------*
03:17:42:WU02:FS00:0xa4:Folding@Home Gromacs GB Core
03:17:42:WU02:FS00:0xa4:Version 2.27 (Dec. 15, 2010)
03:17:42:WU02:FS00:0xa4:
03:17:42:WU02:FS00:0xa4:Preparing to commence simulation
03:17:42:WU02:FS00:0xa4:- Looking at optimizations...
03:17:42:WU02:FS00:0xa4:- Files status OK
03:17:42:WU02:FS00:0xa4:- Expanded 924009 -> 1527780 (decompressed 165.3 percent)
03:17:42:WU02:FS00:0xa4:Called DecompressByteArray: compressed_data_size=924009 data_size=1527780, decompressed_data_size=1527780 diff=0
03:17:42:WU02:FS00:0xa4:- Digital signature verified
03:17:42:WU02:FS00:0xa4:
03:17:42:WU02:FS00:0xa4:Project: 9011 (Run 747, Clone 3, Gen 188)
03:17:42:WU02:FS00:0xa4:
03:17:42:WU02:FS00:0xa4:Assembly optimizations on if available.
03:17:42:WU02:FS00:0xa4:Entering M.D.
03:17:45:8:127.0.0.1:New Web connection
03:17:48:WU02:FS00:0xa4:Using Gromacs checkpoints
03:17:48:WU02:FS00:0xa4:Mapping NT from 4 to 4 
03:17:48:WU02:FS00:0xa4:Resuming from checkpoint
03:17:48:WU02:FS00:0xa4:Verified 02/wudata_01.log
03:17:48:WU02:FS00:0xa4:Verified 02/wudata_01.trr
03:17:48:WU02:FS00:0xa4:Verified 02/wudata_01.xtc
03:17:48:WU02:FS00:0xa4:Verified 02/wudata_01.edr
03:17:48:WU02:FS00:0xa4:Completed 91585 out of 250000 steps  (36%)
03:18:27:WU02:FS00:0xa4:Completed 92500 out of 250000 steps  (37%)
03:20:10:WU02:FS00:0xa4:Completed 95000 out of 250000 steps  (38%)

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 tags.[/color]

[bruce]

Your log doesn't show any GPU activity. You need to show an overnight segment so that the computer is idle for long enough for the GPU to accomplish something.

The 'light' setting uses half of the CPU threads (4 out of 8) but since the CPU is hyperthreaded, it may or may not be loading all four Floating Point Units which are shared across 8 Virtual CPUs. (FAH uses mostly FP operations so that's where most of the heat is generated.) I'm not sure how Windows manages conditions like that, randomly or showing a preference for using all of the FPUs.

[jrweiss]

Though your CPU has a Tcase max of 72.2C, you should probably look at the cooling air flow in your case. It appears your CPU is running at 3.8 GHz, which is neither the base clock (3.6) nor the normal Turbo clock (4.0), so either you have the base overclocked or the Turbo clock is temperature limited. My 4770K (Folding @87% 24/7) seldom gets to 70C at its 3.9 GHz Turbo clock.

First, open the machine and clean out all dust. While the heat sinks and fans are primary, also look for dust elsewhere. If there is a lot of it, you need to fit air filters on your intake fans.

While you're inside, assess the air flow. The total intake air should be more than the total exhaust air (including PSU and GPU exhaust, if applicable). That sets up "positive pressure" so dust is not sucked in through crevices by the exhaust fans. Depending on your case, you may be able to add an intake fan or replace the current one with a higher-flow fan (e.g., Noctua). Look to see that flow paths are not blocked by cables and/or PCIe cards, and that no fans are "fighting each other" in flow. If possible, your CPU fan should blow right into an exhaust fan (top or rear). Check your GPU card. If it has apparent exhaust slots on the backplane, make sure the air flow from the fan actually is directed outside. I.ve seen a couple designs that do NOT actually allow much air out the back. When you're done cleaning and re-arranging as necessary, close the case again.

If you have PWM (variable speed) fans, check your BIOS and/or fan control utility to ensure the fans are set to run at 100% above 50C. Also check that CPU Turbo mode is enabled, and you are otherwise at stock clocks.

Download CoreTemp and/or CPUid Hardware Monitor, plus CPUz and GPUz, or similar, so you can monitor temps, clocks, and loads real-time (I'm not familiar with Speccy, but that's fine if it does all that). Pause all Folding and let the machine cool down at idle for 10-15 minutes. Record the CPU and GPU temps at idle; around 35-40C is nominal.

Start CPU Folding only. Set it temporarily to run on all cores, if it is not set already. CPU temp rises rapidly under load, so it should max out in less than 5 minutes. In a nominal 70F room temp, it should run happily well below 70C, preferably 60C or less. If not, you need more case cooling; again, start with intake air. You may also want to clean and replace the thermal paste between your CPU and heat sink, if you are able.

If the CPU runs cool enough with it alone under load, load up the GPU. GPUz has a nifty utility ("PCI render test"; click on the "?", center-right on the Graphics Card panel) that will load the GPU to near 100%. Monitor both CPU and GPU temps. GPU temp takes longer to reach max under load, so wait 15-20 minutes unless it overheats (100-105C on most current GPUs). If your GPU cooling is adequate, both it and the CPU should remain within limits. If the CPU gets significantly hotter, you need more exhaust air flow (and probably some additional cool intake air) to get rid of the GPU heat.

[QC91]

Hi, Thanks for all the help I did switch the Fan Control Override and the temp stays a lot lower there is no dust here is the screen shots form core temp


Temp without Folding




temp with folding at low.png




Temp with folding at medium

[QC91]

the photos is with the Fan Control Override not turn on it is set to the factory default

Thanks

[jrweiss]

Not a lot of temperature difference when going from ~50-90% load. Also, your CPU clock is at 3.8 GHz, which is neither the stock or stock turbo clock. That may mean it is temperature-limited at 3.8. Do you have a readout of fan speeds at those levels? What fans do you have, doing what functions?

[QC91]

Hi, this the the CPU I have http://ark.intel.com/products/80806/Int ... o-4_00-GHz I will have to see about the fan speed my PC is a Dell Precision 1700 it was made in February 2015 it 's few weeks old

Thanks for all the help

[Rel25917]

Not a lot of temperature difference when going from ~50-90% load. Also, your CPU clock is at 3.8 GHz, which is neither the stock or stock turbo clock. That may mean it is temperature-limited at 3.8. Do you have a readout of fan speeds at those levels? What fans do you have, doing what functions?

Speed on a stock intel system will change according to several factors like how many threads are in use, one thread in use speed goes full turbo, speed comes down as more threads come up, and of course they will downclock for temperature, don't think 70 is enough but maybe that particular bios likes to keep it cooler.

[QC91]

Hi, here is the fan speed can only see GPU and CPU I can see the CPU only via Dell Diagnostics Partition it is at folding at medium setting

[QC91]

I have a Dell Precision T1700 http://www.dell.com/support/Manuals/us/ ... 2155904029

Thanks for all the help

[Napoleon]

Temp wiht folding at medium

Could very well be that I'm not up to speed with the terminology as it is applied to newer (Intel) CPUs, but I'm inclined to think that Tcase and Tcore (case and core temperatures) - are different things. Applied to CPUs, I'd think "case temperature" is measured from the CPU heatspreader, while Tcore is (are) the temperature(s) inside the CPU. Maximum Tcase for 4790 is 72C, maximum Tcore has to be higher than that. CoreTemp suggests 100C maximum Tcore, which would leave you with a reasonable margin. Tcore > Tcase - always. It has to be so, there wouldn't be any thermal flow without a temperature difference.