Hey folks can you help me to figure out this mystery please?

I’m trying to power a newly purchased SER8 with an USB-C power supply. It works perfectly fine with original 120W powerbrick but when I try to replace that with an USB-C supply it shuts down the moment I start cinebench.

I tried both the normal and boosted mode in BIOS
I tried a 100W PD3.0 and a 140W PD3.1 power supplies
I tried PD3.0 100W and PD3.1 240W certified cables
I tried to plug directly into the USB-C port at the back, and via a 5.5×2.5mm to USB-C adapter into the barrel jack socket

The PC boots fine in either case, but the moment I try to put it under any type of load the PC just shuts down instantly.

I have two of SER8 and a bunch of different powerbricks and the same thing happens every time, so it’s not an individual unit problem. and judging by my power meter it never peaks over 70w of power consumption, so either 100W or a 140W setups should technically be fine. And again the PC works fine with the original power block, so….

Halp? Any ideas? I would love the option to use a smaller power brick instead of the original chunker

Try running other CPU - and GPU - intensive applications besides Cinebench to see if the same shutdown issue occurs. This can help determine if the problem is specific to Cinebench’s power - draw pattern or a more general issue with high - load power consumption.
External Power Management Devices: Consider using an external power management device that can condition and stabilize the power from the USB - C supply before it enters the PC.

4 months later

  • PPaulo

    • Post #3
    • Edited

    Is anyone else having this issue (or hopefully solved it)?

    I have been attempting to power my Ser8 with a Caldigit TS4 which should be more than capable of powering this pc. However, the pc wont boot past bios and continually shuts down a few seconds after the beelink logo shows up.
    The pc boots with the external power brick, but I bought this specifically to run off my usb hub.

      Paulo Hi there, did you change the TDP to 65W in the BIOS ?

        I set it to the lowest power setting in the bios

        I’ve also updated the bios to the latest version and reinstalled windows. It seems this PC just doesn’t run properly over USB-C. Probably going to have to return if there isn’t a fix for this. Nobody else having the same issues?

        4 days later

        ① Hello there,

        Please press delete key as soon as you turn on the PC, so that you can go to BIOS. Please send us a picture of the Main page.
        We will check if you need to update the BIOS.

        ② Use a USB-C PD trigger cable or adapter that forces 19V output (bypassing PD negotiation quirks). Example: Watt Toolkit.

        11 days later

        I have experience this same issue with SER9 370 and USB-C with 100w PD from my monitor, but only after I bumped my RAM speed to 8000 from 7500mt/s. As soon as I ran geekbench or CPU stress test, it went lights out.

        I also can’t get it up to 65w draw performance, so I haven’t done more testing on this issue until I get my SER9 pulling 65w.
        Given this is happening over different models, maybe there is something common?

          rktchip Hi there, the USB - C with 100w PD from the monitor might not be providing stable power. Even though it’s rated for 100w, there could be issues with the power delivery protocol or compatibility between the monitor and the SER9. This might lead to power fluctuations when the system is under stress, causing it to shut down.
          Insufficient power for overclocked RAM: Increasing the RAM speed from 7500mt/s to 8000mt/s might have increased the power consumption of the system. If the power supply from the monitor or the internal power management of the SER9 can’t handle the additional load, it could result in system instability and shutdowns.

            a month later

            I’m actually trying to do the opposite. I’m fine with keeping my SER8 powered using the original power brick and barrel jack, but I would simultaneously like to connect it to a Thunderbolt 3 universal dock through the rear USB-C port (to connect to multiple monitors). The dock can provide 94W of power through the Thunderbolt port.
            If I connect my SER8 to both the main power brick and the dock, will that cause any problems? Or will the SER8 know to only draw power from power brick?

            In case it matters, this is the dock I want to use:
            https://www.caldigit.com/usb-c-pro-dock/