Difficulty with undervolting and temps a15r4

Discussion in '2015+ Alienware 13 / 15 / 17' started by dasachmo, Jul 9, 2018.

  1. dasachmo

    dasachmo Notebook Consultant

    Reputations:
    10
    Messages:
    130
    Likes Received:
    24
    Trophy Points:
    31
    Hi everyone

    Just wanted some advice on undervolting. I have a 8750h with 1070 and temps at normal usage are pretty fine ranging from 45-58.
    I started playing wildlands and noticed that the fan was running at 100 so checked temps with HWInfo.
    I found that with the power saver power mode on the multiplier was limited to 22x and temps are fine during the game (they reach high 80s.
    When I use balanced power mode it uses the full 39-41x but the temps are high - 95-99 and thermal throttling.
    I undervolted using XTU by -100mv ( think thats right) and the temps dropped quite a bit.

    My questions are:
    1. the undervolt doesnt stick using XTU. I tried the method on the other thread but every time i run stage 4 as admin it shows the script permission as no. Im obviously doing something wrong?
    2. When I applied the undervolt is unlocked the multiplier to 41x. Before that the balanced power mode always ran at 22x (2.2ghz)
    3. Is using throttlestop a better way of doing it compared to XTU that sticks permanantly? I'd rather have a relatively simple undervolt that sticks. Im not so keen on reducing the multiplier unless its essential.. right?

    And finally.. When i benchmark or run the stress test in XTU the temps are better than when im running the game... that cant be right can it?

    Thanks for your help in advance.
     
  2. captn.ko

    captn.ko Notebook Evangelist

    Reputations:
    110
    Messages:
    403
    Likes Received:
    272
    Trophy Points:
    76
    I like throttle stop more than xtu. You can use different profiles with different clocks and undervolts.

    Lower temps with xtu stress is normal since your CPU and GPU share the same heatsink.
     
    Last edited: Jul 9, 2018
    cn555ic likes this.
  3. Azther

    Azther Notebook Guru

    Reputations:
    10
    Messages:
    64
    Likes Received:
    46
    Trophy Points:
    26
    with the XTU script method you have to make sure it runs with highest privileges, i also had to change the user of the script to match my user iirc, which is the admin of the pc in my case, you can also get a extra temp drop by undervolting the cache alongside the core, i have -150mv on core and cache on my 6700hq, different cpu ofcourse so your mileage will vary. i tried throttlestop in the past, but went XTU when i discovered throttlestop had a built in expiry date on it (it gets annoying having to update it everytime and transfer settings over)
     
  4. dasachmo

    dasachmo Notebook Consultant

    Reputations:
    10
    Messages:
    130
    Likes Received:
    24
    Trophy Points:
    31
    I've finally got the undervolt of - 0.100mv in cpu and cache. Limited the multiplier to 37x on 6 cores
    Just wanted to ask... When I'm not on mains power it seems to limit the multiplier to 18x so it's 1.8ghz
    Why is this... Due to speedstep or undervolt /power throttling?
    It works fine with cool temps under load max of 88/90
     
  5. Azther

    Azther Notebook Guru

    Reputations:
    10
    Messages:
    64
    Likes Received:
    46
    Trophy Points:
    26
    might be due to ur power settings possibly, undervolt shouldnt cause it, id double check those first
     
  6. Pete Light

    Pete Light Notebook Deity

    Reputations:
    167
    Messages:
    1,047
    Likes Received:
    635
    Trophy Points:
    131
    Yes Throttlestop is much better. XTU is a buggy Piece of S***. I stuck with it trying to make it bug free for a year before I gave up and used Throttlestop, never looked back since (although there's a bit of a learning curve to begin with). It also provides greater control than XTU on undervolting much more than just the core and cache.

    Uncleweb released a newer and slightly older version that is permanent and has no expiry on it now, check here: https://www.techpowerup.com/download/techpowerup-throttlestop/

    Check version history for 8.60. It says he remade 8.50 to remove expiry and 8.60 also has this removed :D

    Windows Balanced Power Plan is the likely culprit. Just use the Max Performance power plan and tweak the battery settings within that
     
  7. Azther

    Azther Notebook Guru

    Reputations:
    10
    Messages:
    64
    Likes Received:
    46
    Trophy Points:
    26
    oh wow i stand corrected, ty for letting me know, having a 6700hq tho, would it be worth my while to switch back to TS when i have the automated XTU script set up? i guess it does have extra options... hmm *ponders*
     
  8. Pete Light

    Pete Light Notebook Deity

    Reputations:
    167
    Messages:
    1,047
    Likes Received:
    635
    Trophy Points:
    131
    I would but the benefit is less with an HQ processor of course
     
  9. Azther

    Azther Notebook Guru

    Reputations:
    10
    Messages:
    64
    Likes Received:
    46
    Trophy Points:
    26
    so ive got TS up and running again, looking for some advice though, if you dont mind ofcourse xD i always just stuck with an UV of -150 on core and cache, but i noticed theres the other options like analog I/O and igpu, are those worth messing with? or would i get more temp drop by adjusting those? i just wanna squeeze as much performance out of the cpu as possible, so if theres any other settings you would recommend id be all ears, im rather novice in the undervolting side of things

    EDIT: so i experimented with the analog I/O and system agent, managed to achieve -110mv stable on them, but noticed no temp difference, so i just stuck with my original -150 on core and cache only, i did go higher on those too, but it resulted in instability
     
    Last edited: Jul 17, 2018
Loading...

Share This Page