7700HQ Power Limit Throttling

Discussion in '2015+ Alienware 13 / 15 / 17' started by koharatx, Jun 9, 2017.

Thread Status:
Not open for further replies.
  1. koharatx

    koharatx Notebook Enthusiast

    Reputations:
    0
    Messages:
    12
    Likes Received:
    11
    Trophy Points:
    6
    TL;DR: Even if you have a locked CPU (6700HQ/7700HQ), make sure you enable "CPU Performance Mode" in your BIOS. Otherwise, you will get power limit throttling when/if your CPU requires anything over 45W. Manual settings in XTU will not override this. Dell/Alienware are retards for not making this setting default, and they are aware of it since at least March, according to this Dell Knowledge Base article (SLN305033).

    I've never overclocked before, and therefore never had to screw around with undervolting and power limits. I hope this post may help anyone who finds out their CPU is running crippled at less than 85% potential (2.8GHz vs 3.4 GHz).




    Original post below
    ________________________________________________




    Hi all, been lurking for the past few weeks, first post. I am working with two 17 R4 7700HQ/1070/QHD G-Sync, from Best Buy. One is mine, one is my wife's. Long story short, we tried MSI Stealth Pros with garbage screens and both freezing during League of Legends, then had a few 17 R4 (had to exchange one for faulty keyboard and more freezing during League for wife?), beginning with 1080 screens, but when price went down recently, returned them for a "free" upgrade to the QHD G-Sync model. Holy crap... how hard is it to just get a decent gaming laptop, right?!

    Anyway, I have repasted my laptop with Thermal Grizzly Conductonaut, bent the heat sink arm, and replaced the factory thermal pads with Fujipoly. Thanks @iunlock , Team LHz, and everyone else who has contributed all the helpful information in these forums. I have read hundreds, or maybe thousands of posts on i7 6700/6820/7700/7820 core temperature differentials and fixing heat sinks, and all that fun stuff. I went from >20 C core temperature differential, with temps hitting the 90s, down to much more acceptable numbers.

    I don't have much experience overclocking and such, but I managed to undervolt -150mV to lower temperatures... then I also realized that the undervolt allowed my CPU to hold at 34x without budging a single time during a long OCCT test. Holy crap! I did notice before the undervolt that my CPU would hit power limit throttling, but didn't think much of it before trying to get temps stable. Then, it was just fixed, anyway. Please see below:

    [​IMG]

    [​IMG]

    [​IMG]

    Seems to be working fine, to me. Not a single throttle, holding steady at 34x!

    In contrast, just tested my wife's system, which I haven't repasted, yet. Temperatures seem alright, so I thought maybe she won the silicon lottery, but I noticed the power limit throttling. It was originally throttling her system down to 28x, so of course temps were okay...

    I tried undervolting her system to -150mV... it crashed before I could get setup for testing. Okay, then. Took the undervolt to -140mV, then tested and seemed stable (EDIT: wife just got a blue screen playing Black Desert Online, so I took the undervolt to -130mV). Temps seem stable running small data sets. But it is still being power limit throttled. Please see below:

    [​IMG]

    [​IMG]

    [​IMG]

    Her voltages look to be the same as mine, but her system is going above the 45W PL1 and still being throttled to 33x as a result. Soo... what do? How do I get her clocks stable like mine if I can't undervolt any further than -130mV? Can I just raise the turbo boost power max higher than 45W? If so, what is a safe power (or does the short power max of 60W keep things in check)?






    Side note:

    Why in the HECK does this not work properly from the factory?! What a load of bull... I feel like I should have built a couple of desktops, but Best Buy had their sweet 24-month free financing so that's why we got these laptops. For ****s and giggles, I overnight tested my old, cheap Dell desktop I use as a Plex server (Core i3 2120 using integrated graphics and 8 TB hard drive storage, original Intel heat sink and paste). For 12 hours it was locked at 33x, Core 0 ran 64-69 C, Core 1 ran 65-70 C, super stable, all flat monitor curves, and I couldn't tell if the CPU fan ever even ramped up... it's in a cabinet! It was run for countless hours over the years before that, with a GTX 550 Ti that used to be in it. Tested my super-thin HP Omen 15 (first gen, aluminum chassis) for comparison purposes (I did repaste with AS5 awhile back), core differential of only a few degrees, temps under 80 (once fans ramped up) but THAT system was being power limit throttled, too! I find it unacceptable that these machines are unable to run the specified multipliers on LOCKED PROCESSORS (4710HQ could be bumped up a couple of multipliers... but for all intents and purposes I'm still going to consider it locked). After all the reading I've been doing in these forums recently, I think I'm becoming a BGA hater, too...
     
    Last edited: Jun 10, 2017
    Vasudev and hmscott like this.
  2. koharatx

    koharatx Notebook Enthusiast

    Reputations:
    0
    Messages:
    12
    Likes Received:
    11
    Trophy Points:
    6
    I forgot: we are both on BIOS 1.0.8. Is this the kind of limiting people speak of after 1.0.2? Will downgrading stop this?

    Edit: I lied, we are on Kaby Lake BIOS 1.0.5.
     
    Last edited: Jun 9, 2017
    Vasudev likes this.
  3. koharatx

    koharatx Notebook Enthusiast

    Reputations:
    0
    Messages:
    12
    Likes Received:
    11
    Trophy Points:
    6
    I learned a couple of new things. I moved the slider up in XTU for turbo boost turbo max, up to 50W. When I started the test, it looked like the CPU was holding steady at 34x. I went to eat, then came back, and much to my dismay, it wasn't holding at all. The wife's CPU was still power limit throttling, even though PL1 showed to be less than 50W. Actually, it even dipped to 32x a few times!

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    So... she's playing Black Desert Online and I probably won't be able to mess around with her laptop for a couple of hours; I started poking around on my own system. I got in the BIOS and enabled "CPU Performance Mode", even though we have 7700HQ. Upon getting back into XTU, I found THIS!

    [​IMG]

    So, CPU Performance Mode actually DOES something on the 7700HQ systems. PL1 and PL2 are raised to 92W. Just to check that no funny business is going on, I tested my own system. It pretty much ran the same 34x steady.

    [​IMG]

    [​IMG]

    [​IMG]

    Excuse the dip on CPU frequency... I guess OCCT wasn't quite stable at 34x on four cores before I reset HWInfo.

    Now, obviously testing my own system doesn't help anything, since apparently I won the silicon lottery, and my wife's CPU is more power hungry. I will report back here once I get the chance to enable her BIOS "CPU Performance Mode" and run a new test.
     
    Vasudev and hmscott like this.
  4. koharatx

    koharatx Notebook Enthusiast

    Reputations:
    0
    Messages:
    12
    Likes Received:
    11
    Trophy Points:
    6
    Welp, problem solved! Even if you have a locked CPU (6700HQ, 7700HQ), make sure you enable "CPU Performance Mode" in the BIOS, so your CPU can actually perform at its full, unthrottled potential. Here are the results on my wife's laptop, unopened, factory paste, CPU Performance Mode enabled, undervolted -130mV:

    [​IMG]

    [​IMG]

    [​IMG]

    Look at that sweet, flat frequency graph! 34x all day!
     
  5. orancanoren

    orancanoren Notebook Consultant

    Reputations:
    5
    Messages:
    243
    Likes Received:
    42
    Trophy Points:
    41
    After seeing your post I was worried. I'm glad you were able to solve the problem
     
    hmscott and Vasudev like this.
  6. JasperF

    JasperF Notebook Enthusiast

    Reputations:
    0
    Messages:
    16
    Likes Received:
    4
    Trophy Points:
    6
    Hello,

    You are "De Man!!! I have same R$ 17 from Best Buy. Could not understand WHY it throttled. Ran across your post and had to go learn a little to understand what you were saying. Finally, I went to BIOS and enabled PERFORMANCE MODE as you suggested.

    Worked like a charm! I should have done that first but then I would not have seen or understood what I did.

    Thank you

    P.S. What LINK did you follow for your Re-Paste? Thanks!
     
    hmscott likes this.
  7. Vasudev

    Vasudev Notebook Nobel Laureate

    Reputations:
    7,290
    Messages:
    10,365
    Likes Received:
    7,632
    Trophy Points:
    931
    @koharatx Use large data set and check the temps. Maybe I think you have Clamp option enabled in ThrottleStop(if you're using it).
     
    hmscott likes this.
  8. VICKYGAMEBOY

    VICKYGAMEBOY Notebook Deity

    Reputations:
    405
    Messages:
    1,016
    Likes Received:
    748
    Trophy Points:
    131
    using cpu performance mode : max PL1 PL2 limit 92W, also increased FAN speed from normal max of 5200rpm to 6200rpm, more like Jetblast :)
     
    hmscott and Vasudev like this.
  9. VICKYGAMEBOY

    VICKYGAMEBOY Notebook Deity

    Reputations:
    405
    Messages:
    1,016
    Likes Received:
    748
    Trophy Points:
    131
    @Vasudev @Papusan @hmscott @iunlock i wrote a long mail to alienware.. explaining them my situation, and the problems ive faced in past 2 years with all the 15R1 and R2, the list goesss like a scroll, now lets wait and see what is their reaction.. atleast a BIOS or new driver should be out soon..
     
    Vasudev and hmscott like this.
  10. gschneider

    gschneider Notebook Evangelist

    Reputations:
    248
    Messages:
    568
    Likes Received:
    166
    Trophy Points:
    56
    Hi I just got around to testing my 7700HQ with OCCT. I run into the same power limit throttling you mentioned!

    I have just enabled performance mode I am going to see what happens then retest with 3Dmark
     
    hmscott and Vasudev like this.
Loading...
Thread Status:
Not open for further replies.

Share This Page