Dell Precision M6800 Laptop Quadro M5000M GPU Power Limit throttling issue at 100W

Discussion in 'Hardware Components and Aftermarket Upgrades' started by surfinkin, Aug 31, 2019.

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Did you face throttling with m5000m in your dell or hp workstation?

  1. Yes

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  2. No

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  1. surfinkin

    surfinkin Notebook Guru

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    Hello dear readers and tech enthusiasts!

    I own a Dell Precision M6800. Config below:
    i7 4810MQ
    16 GB [8 GB x 2] Vengeance DDR3 1600Mhz Cl9
    Quadro M5000M
    480 GB SSD + 500 GB HDD

    It is a nice workstation / gaming unit which gets my job done. The 17" display helps. I recently tumbled upon the GPU throttling I am experiencing with my M5000M Graphics card. I started checking out the details and the card is capped at just 100W power and that's limiting it's performance in heavy applications. It is not the temperature cuz it never exceeds 77C in heaven (gpu bench) or valley (gpu bench). It doesnt reach the 100W cap at its 962MHz freq too.
    Only some applications seem to stress out the gpu like DoTA 2 (game with vSync off) , FurMark (gpu bench). When the GPU power consumption crossed 100W, it starts throttling to lower frequencies.

    I tried to edit the VBIOS but the power targets are already too high around 1000W. Yes it is way higher for default values. I downloaded from techpowerup db and it still is the same values all the way around apart from being a higher firmware version.

    Can someone help me out by pointing towards a possible solution?
     

    Attached Files:

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  2. jaybee83

    jaybee83 Biotech-Doc

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    im guessing this is a motherboard restriction, likely implemented by the vcndor. could either be that the mobo power delivery system is indeed maxxed at 100W or that the vendor implemented that limit to avoid overstressing the system in high temp / high stress situations (limiting power also limits reaching excessive temps, after all ;) )

    so in that case, ud probably need a combination of modded BIOS, EC and VBIOS to circumvent that power cap
     
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  3. surfinkin

    surfinkin Notebook Guru

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    thank you for your super quick response. i thought of that restiction but people are doing mods on k4100m with stupid high clocks with 135w power limits if im not wrong on the same laptop. what could possibly be stopping this m5000m?

    is it possible to override using the efi commands for the dell bios?
     
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  4. TheReciever

    TheReciever D! For Dragon!

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  5. jaybee83

    jaybee83 Biotech-Doc

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    could be different on Kepler (K4100M) and Maxwell (M5000M) though. u sure it was the exact same model from the same release year?
     
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  6. Aaron44126

    Aaron44126 Notebook Virtuoso

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    I don't think that it is a motherboard restriction. There is a motherboard restriction on power, but Pascal cards in the M6800 can draw up to around 120W before power-throttling. (Note, drawing this much power causes the CPU speed to become capped, even if a 330W power supply is connected — there is a motherboard power limit.)

    I have M5000M in my Precision M6700. GPU-Z reports "idle" for the perfcap reason when the GPU is running at full load. (When I tried a P5000 it would report power throttling for the perfcap reason.) Maxwell cards don't boost as aggressively as Pascal cards. I think this is just the clock speed that it "wants" to run at. I think you'd need a modified vBIOS to get it to kick the clock speed up higher. Not something that I have experience with on this card. But I would be interested — there is plenty of thermal headroom to run the clock speed higher.

    P5000 power throttling, see "green" in perfcap reason.
    [​IMG]
     
    Last edited: Aug 31, 2019
  7. surfinkin

    surfinkin Notebook Guru

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    I wonder why pwr perfcap. i am not getting what you are referring to. exact what model? i am sorry im not so good with english :(
     
  8. surfinkin

    surfinkin Notebook Guru

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    welcome to the thread. i done some core and mem clock freq mods to the vbios of the k4100m thats now sitting in my hp 8770w unit. similarly i have done a few tweaks to the m5000m after observing throttling. it doesnt help the card when it is stressed. in some applications even though the gpu utilization is 100% the clock sticks (1100core/2750mem) if the power consumed by that is <100W. then there are some applications that stomps on the card that insta rises the power consumed to >100W then it fast throttles to less than base frequency; from 962 stock or 1100 modded to a state where it doesn't take >100W like 710mhz or 720 mhz. refer attachment in the first post. if i could push it to 120w then it's good game

    ( that's a unique capture you have done. on the far right towards bottom. but hey it is what it is :D :D )
     
  9. Aaron44126

    Aaron44126 Notebook Virtuoso

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    I'm referring to the thing in the GPU sensors tab which tells you why the card is throttling. "Perfcap reason".

    I referred to two different cards.
    Quadro M5000M: GPU-Z reports "idle" perfcap reason when the card is under full load and running at 962 MHz. This means that the card doesn't think that it is throttling.
    Quadro P5000: GPU-Z reports "power" perfcap reason when the card is under full load. So in this case, the card wants to draw more power but it cannot so it has to clock down.

    Recall that M5000M uses around 100W but P5000 uses around 120W. So the system power limitation for a MXM card is around 120W.

    All this to say, I don't think that the M5000M is power-throttling in the sense that there is no more power available in the system for it to use. There is more power available, it is just choosing not to attempt to draw anymore. This is partly in response to @jaybee83 above who speculated that the motherboard cannot deliver any more power to the card. It can, as we have seen when @JEAMN put the GeForce 1070 in. I say that the Quadro M5000M itself is not trying to draw more than 100W even though the power is available.

    So, either this is a vBIOS limit or maybe the card isn't capable of using more than 100W (limitation of VRMs?). I haven't tried to push it past this limit so I do not know.
     
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  10. surfinkin

    surfinkin Notebook Guru

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    It makes sense to think that the power cap is >=120W on the M6700. However, could you please do a furMark bench for me to see if the GPU power throttles the M5000M on M6700? I am now curious to find out if it is different with M6700 and M6800 variants.
     
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