New Latitude 5470

Discussion in 'Dell Latitude, Vostro, and Precision' started by jasperjones, Dec 16, 2015.

  1. tr0tt3r

    tr0tt3r Notebook Enthusiast

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    http://www.notebookcheck.net/Dell-Latitude-14-E5470-Notebook-Review.161556.0.html
    "We use our reference card Toshiba Exceria Pro SDXC 64 GB UHS-II to evaluate the performance of the SD-card reader. We copy around 300 JPG pictures (~5 MB each) and can measure high transfer rates of up to 151 MB/s. AS SSD determines sequential transfer rates of 202.95 MB/s (read) and 117.16 MB/s (write) for the card slot."
     
  2. paper_wastage

    paper_wastage Beat this 7x7x7 Cube

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    Hmm... I'm surprised that their review unit (ULV dual core) has a decent idle/load chassis temperature (25-41C). My unit idles at 35+C

    Wonder what is wrong with my unit
     
  3. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    Probably nothing wrong. They might have started the computer from cold or the testing was done in a very cold room. Or possibly the fan rules were changed in a BIOS update. Is your idle temperature with the fan on or off?

    I note that on my E7450 (which has been running for 9 hours) the CPU temperature is around 42C with 10% to 20% CPU usage and the fan is running at ~2760 rpm (but is barely audible). The underside of the computer is warm.

    Update: The fan just cut out: On this E7450 the trigger to turn the fan off appears to be a CPU temperature of 40C and the temperature is now slowly creeping up again.

    John
     
  4. ALLurGroceries

    ALLurGroceries   Super Moderator

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  5. paper_wastage

    paper_wastage Beat this 7x7x7 Cube

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    yes

    in UEF/BIOS, you can enable/disable specific drives (I disabled my SATA, enabled only WWAN. installed windows, can boot with this)

    SATA-0 - ?
    SATA-1 - WWAN
    SATA-2 - SATA
    SATA-3 - ?
    M.2 PCIe SSD-0
     
    Last edited: Mar 31, 2016
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  6. paper_wastage

    paper_wastage Beat this 7x7x7 Cube

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    been testing ubuntu (16.04 beta2, can't use 15.10 since it doesn't have wifi or Intel HD 530 support)

    it looks like the UEFI/BIOS controls the fan speeds.

    At boot, fan is around 2k rpm with CPU hovering around 42C

    Tried to use i8kfan to set fan to highspeed. Fan spins high, then it looks like UEFI/BIOS spins it back down after 1s.

    If I use a loop and force-execute i8kfan highspeed, then the fan spins high continuously(~3.5k-4k rpm) until I kill the i8kfan loop

    If I stress, CPU temps go up to 80C before fans go highspeed. clock speed does hit 3.5ghz, then bounces around 2.5-2.8ghz (temp goes between 80-95C). When I stop stress, temps drop to ~50C before fan drops down to low speed

    maybe Dell can tune the fan slightly better in BIOS/UEFI
     
  7. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    Yes, the fan rules are coded into the BIOS and could be changed in a BIOS update. I've known this happen. The challenge is to get Dell to appreciate that there is an issue which needs addressing.

    However, have you investigated Dell Command | Power Manager? The version I have on my E7450 has a Thermal Management tab with basic settings which, from the description, appear to change both CPU performance and fan behaviour. I have a dim memory of once investigating the effect but can't remember the details.

    John

    PS: I see that notebookcheck have published a review of this notebook. Unfortunately, it's the version with the low resolution low quality display.
     
    Last edited: Apr 3, 2016
  8. paper_wastage

    paper_wastage Beat this 7x7x7 Cube

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    I really didn't want to install any dell-specific software on my laptop

    (cough: http://arstechnica.com/security/201...tps-certificate-fiasco-provides-removal-tool/)

    (though windows update does pull in certain dell-specific drivers/applications like their touchpad driver/configuration utility

    definitely not installing PE driver/auto-updater/Dell foundation services/digital delivery)

    Installed Dell Command Power Manager. It does give me more options to control the fan/cpu and battery

    battery
    - standard (standard rate charging)
    - expresscharge (fast charge, but degrades battery faster)
    - primary AC use (extends battery's lifespan by lowering charge threshold)
    - adaptive (system adaptively optimizes battery)
    - custom (set start/stop charging %)

    Thermal management
    - optimized (standard setting)
    - cool (cooler system surface,may mean reduced cpu and more noise)
    - quiet (reduce fan noise, may mean higher surface temp and reduced cpu)
    - ultra performance (may mean higher surface temp and more noise)
     
  9. alexbel

    alexbel Notebook Enthusiast

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    Did you change something in bios to enable SSD in wwan port? I just bought M.2 2242 SSD TS512GMTS400 and bios doesn't recognize it
     
  10. paper_wastage

    paper_wastage Beat this 7x7x7 Cube

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    I have a mts400 512GB, works. I updated BIOS just when I received my laptop three weeks ago

    When I get home, I can provide the proper naming, but from memory:

    Under the second main option, I have SATA0/1/2/3/m.2 pcie all enabled

    I have it set to ahci (instead of raid).NOTE: your existing windows partition will not boot when you swap settings. I would test this last, and use a Ubuntu liveusb to test the drive )

    Under the second to last option "wireless", the wwan slot must be enabled (you have option to toggle Bluetooth and wlan as well)

    I don't think BIOS explicitly tells you that sata1 is occupied, don't quite remember. Windows (disk management) definitely sees a raw unformatted disk
     
    Last edited: Apr 11, 2016
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