P150SM Unlocked BIOS/OC Help please (Current Limit issue)

Discussion in 'Sager and Clevo' started by VerseMod, Nov 8, 2020.

  1. VerseMod

    VerseMod Notebook Enthusiast

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    Hi All, I Have a P150SM, however i cant get it passed 3.8ghz (stock) with a 4810MQ. It just current limits straight away.

    in XTU I dont have Processor Current Limit and im not able to adjust the Turbo Boost power time window. I can only assume I would need an unlocked BIOS unless the distributor or an update has locked this out.

    My machine came from PC Specialist if it makes any difference, any help is appreciated, Ive been told a @Prema Bios would fix this, however it seems he may have stopped distributing these unfortunatley.
     
    Last edited: Nov 8, 2020
  2. Meaker@Sager

    Meaker@Sager Company Representative

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    The P150SM could not do this, the P170SM could, it had a bigger CPU heatsink so they gave it a bit more flexibility.
     
  3. VerseMod

    VerseMod Notebook Enthusiast

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    Hmm, so what would my options be in terms of OC? I am assuming there is a lot more to it then just unlocking the BIOS features, I have seen some posts elsewhere of people pushing the 4810MQ in a P150SM to 4.0/4.1. I was told Prema BIOS gives you the ability to Overclock this cpu.
     
  4. Meaker@Sager

    Meaker@Sager Company Representative

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    When power limited it's finding the most efficient point, undervolting a bit and raising the clocks a bit normally. You might be able to move the power target up to 55W at least.
     
  5. VerseMod

    VerseMod Notebook Enthusiast

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    I have tried that, Under normal usage it works fine, but a stress test brings back current limiting, im not expecting an amazing increase, but even 55W or higher it still current limits, I have a much better PSU and even upped it to 80W. Still the exact same issue :/ I honestly feel like its been limited intentionally within the BIOS, I am really struggling with it. However I did notice the BIOS is a PC Specialist BIOS rather then a generic Clevo one. Which may have some part to play
     
  6. Meaker@Sager

    Meaker@Sager Company Representative

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    Well with a power limit under stress tests you would expect your clocks to drop but under more normal loads the clocks to stay higher.

    If you can run 4Ghz in prime95 (pulling a random number here) then you would hope it would be higher in lighter loads.
     
  7. VerseMod

    VerseMod Notebook Enthusiast

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    I have solved it, the issue was the BIOS PC Specialist installed onto it, it was locked right down. However after a very Kind Prema sent me over a BIOS all is good now :). Its stable at 4ghz but i need to lap the heatsink as its thermal throttling after 10 mins or so.
     
  8. Meaker@Sager

    Meaker@Sager Company Representative

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    Make sure the VRM pad is nice and healthy too.
     
  9. VerseMod

    VerseMod Notebook Enthusiast

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    Ah yes i need to replace that, My P150SM I brought off ebay and the previous owner was selling it as spares or repair as he thought the GPU was bad due to random BSOD's, he had lost the GPU heatsink screws but the fault was actually a bad stick of RAM.

    The VRAM Pads do need redoing so thanks for the reminder!

    One thing I did find odd, the CPU fan shroud is smaller then the GPU one from factory. Any reason for this? The actual fan itself appears to be the same size, but the metal shroud is smaller, I need to get another GPU fan and see if I can make the larger shroud fit by flipping it upside down. I doubt this will do anything to the temps but as I plan on making the air intakes on the bottom of the P150SM bigger It may help with more stable temps. I do also have a low profile CPU fan from a Acer Aspire Nitro v17 which I was going to see if I could get inside the laptop between the GPU and CPU somehow to move some of the hot air around that lingers in there. I'm unsure if that will fit but I don't want anything sticking out from the bottom of the laptop and want it to stay visually pretty stock and as portable as it initially was without having to plug anything extra in etc.

    The Joys of an ongoing project :),
    However thank you for all your input so far Meaker, no doubt I will have some questions or queries in the near future

    -Rain
     
  10. Meaker@Sager

    Meaker@Sager Company Representative

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    Got a pic of the fan fitment on the heatsink?
     
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