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News on Haswell based mobile Precision M6800 ?

Discussion in 'Dell Latitude, Vostro, and Precision' started by HPVD, Mar 7, 2013.

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  1. SvenC

    SvenC Notebook Evangelist

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    Just got a second U2412M and attached both to my m6800.
    One with DP and one with VGA as I have no HDMI to DVI-D cable/adapter available.

    As long as I have the FirePro enabled in device manager (Win 8.1 x64) I have no problems to use the laptop display and the two external monitors. But disabling the FirePro removes access to the external displays. The just do not show up in Control Panel > Display > Screen Resolution. Re-plugging the monitor cables didn't help. Reenabled the FirePro and the displays were used again.

    Looking at the switchable graphics information from CCC it seems that no application is using the FirePro, so I do not know if and how much more power consumption the external monitors cause. But typically if I attach an external display there will be a power plug for the laptop as well. So not much of an issue.
     
  2. Aaron44126

    Aaron44126 Notebook Prophet

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    External displays are wired to the discrete GPU, so it will always be in use to run these monitors.
     
  3. tijo

    tijo Sacred Blame

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    Alright, so I'm a bit late, but AMD has the same driver available for the firepro M6000 than for the M6100 now, downloading under Windows 8 now and I will then install and run specviewperf11 on it.

    Two bench posts on the M6100:
    http://forum.notebookreview.com/del...ed-mobile-precision-m6800-63.html#post9419692
    http://forum.notebookreview.com/del...-haswell-based-mobile-precision-m6800-62.html

    Results for the Firepro M6000 on current drivers.
    ViewPerf_Win8_131524.png

    Performance of the two GPUs seem very similar for the moment, but I'd bet newer drivers will eventually squeeze more out of the M6100.
     
  4. Air1

    Air1 Newbie

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    Hello
    About AC adapter: is it possible to use a less powerful power supply with the M6800 (120 or 180W type)?
    The original adapter is very big and heavy for a daily displacement...
     
  5. SvenC

    SvenC Notebook Evangelist

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    I use a 90w adapter at home and when travelling without problems and leave the original adapter in the office.
    With a 65w adapter the system does not start.

    The battery is hardly charging with a 90w adapter, when the laptop is running but apart from that for me as a software developer there are no additional drawbacks.
    Might be different for people who really use the GPU or the 49x0 CPUs at max speed, which I guess will lead to throttling.
     
  6. Air1

    Air1 Newbie

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    Here's the answer I expected, super!
    Thanks SvenC
     
  7. unferth33

    unferth33 Notebook Consultant

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    Does it show a warning at boot time with the smaller adapter? (m6600 would..)



    Sent from my RM-820_nam_att_100 using Tapatalk
     
  8. Aaron44126

    Aaron44126 Notebook Prophet

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    See Bokeh's M6600 review for information on how the system behaves with different power adapters. http://forum.notebookreview.com/del...iew-warning-large-pics-personal-opinions.html (Ctrl+F for "So what happens when you plug in a smaller power adapter?")

    Should be similar situation on the M6800, a little better though as power usage/requirements continue to drop generation to generation.

    You'll take a performance hit with a less capable power adapter, I personally bought a couple extra so I can leave one at home, one at work, etc.
     
  9. SvenC

    SvenC Notebook Evangelist

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    Yes, it does.
     
  10. Air1

    Air1 Newbie

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    hello
    The M6800 keyboard is always high flexible in the center such as the M6600?
    Thanks
     
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