Hello, I am experiencing a significant performance regression on my DGX Spark system that has persisted for the last week, impacting both LLM inference tasks (LM Studio, llama.cpp) and PyTorch workloads. I previously had stable performance with no issues for a few months. Issue Summary: LLM infe…

Update: Thanks @christian.pappert for sharing your observations and linking your thread. That helped confirm I wasn’t the only one seeing this. I was able to resolve the issue on my end with a full power cycle. Unplugging the USB C connector from the DGX Spark itself did not fix it, but completely…

using everything out of the box and seem to be getting caught in a low power mode due to the mailbox not loading on startup. not sure what that error means but here’s the bug report. DGX Spark GB10 locked.txt (799 Bytes)

If this happens again, can you run the field diagnostic to determine if there is an issue with your unit? NVIDIA Support

I also had no problem with my 3 MSI EdgeXperts, but I had an issue where the DGX Spark was very slow. I completely unplugged the power adapter from the outlet for about a minute and then plugged it back in, and the DGX Spark’s performance returned to normal. I think there’s something wrong. I notice…

The latest firmware update shows it address the PD power issue directly it seems. sudo fwupdmgr get-devices sudo fwupdmgr refresh sudo fwupdmgr get-updates sudo fwupdmgr update # this updates the firmware sudo fwupdmgr get-history

I’ve read the latest firmware might solve some issues, but also introduces some of its own, most notably on the ConnectX-7 interfaces where a massive performance drop has been observed. Did you observe such issues on your end?

I haven’t encountered any slowdowns so far. If anything i’m seeing (slightly) lower latency across my cluster running llama-benchy.

Got hit with this today… as far as I can tell it happened after my spark crashed when loading to many models into memory. Performance went from 63 t/s on qwen3.5-35b-a3b down to 29 t/s. I can confirm that unplugging the power supply from the wall for a couple minutes resolved the issue.

Have a same issue on my ASUS Ascent GX10, unplugging power adapter resolved the issue. Anyone tried to use different power adapter (maybe apple one 140W USB-C Power Adapter - Apple (CA) ) ?

Again today April 3rd, crash occurred using ComfyUI video upscaler, after reboot performance is terrible. Guess I will have to hook up a smart plug as a hacky workaround. Wish NVIDIA would fix this!!!

DGX Spark Performance Degradation - GPU Power Draw Issue

Accelerated Computing DGX Spark / GB10 User Forum DGX Spark / GB10

christian.pappert February 22, 2026, 12:08am 2

Thanks for posting this. I just submitted a similar observation. Investigating 513MHz cap for GPU.

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DGX Spark Performance Degradation - GPU Power Draw Issue

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