Eliminating MateBook X Pro Power Limit Throttling

Read my MateBook X Pro teardown here.

WORK IN PROGRESS

May 10

I replaced the CPU thermal paste with Thermal Grizzly Kryonaut and the GPU thermal pad with 0.5mm Fujipoly XR-m. These should give me more thermal headroom, but I didn’t check the temperatures in stock form beforehand, so I have no comparison.

May 15

The MateBook X Pro’s CPU throttles to ~10W under sustained load. Intel XTU and HWiNFO report that this is Power Limit throttling, specifically PL1, which is set to 10W by default.

May 20

I followed this guide to disable DPTF in Windows, and now the package TDP can stay at 30W as long as Turbo Boost Power Max in XTU is set to 30 or above.

With the Power Limit unlocked, XTU’s CPU stress test caused the laptop to shut off. The CPU at that time was 92°C, which leads me to believe that something else, such as a MOSFET, is overheating.

I was on a -100mV undervolt, so I reverted to normal voltage but it shut off even quicker. Therefore, CPU instability is probably not the cause either.

I gave the MX150 a Base Clock Offset of +200MHz and a Memory Clock Offset of +400MHz. They have been stable for me.

5 comments

  1. Had current throttling, now after reinstalling intel thermal framework i get power limit, no matter the watts in xtu.
    I suspect it’s some mosfets or something though, just got that feeling running benches and monitoring clocks, throttling ect.
    I bought some thermal pads, will try it out tomorrow.

  2. Does the i7 CPU hit 4 Ghz? I work a lot with data, but I’m considering getting the i5 versions if the difference in speeds isn’t that great, though the lack of RAM upgradeability gives me pause…

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