when I start mining using XMR-Stark my GPU (GTX 750 TI) is showing weird 0-100% spikes like this: Task Manager, GPU-Z.

My CPU (i7-4790K) is consistent: Task Manager.

My hashrate (cpu+gpu) is consistently around 400 and my GPU temperatures are fine: HWMonitor

The only solutions I found when googling were to change the settings in the NVIDIA Control Panel to maximum performance but that didn't help.

I am not overclocking my CPU nor my GPU. I am using the latest GPU drivers, latest Windows 10 version, and latest XMR-Stark version.

Does anybody know how to fix this (and possibly increase my hashrate)?

Thank you

  • have you tried using a different miner to see if it's causing the problem?
    – Joss Bird
    Commented Dec 29, 2017 at 19:23
  • @JossBird yes, I have tried using a different miner but same result. i.imgur.com/KkFNYJy.png Commented Jan 1, 2018 at 3:09

1 Answer 1


You must open nvidia.txt (a file that xmr-stak creates after running for the first time) and set bsleep and bfactor to something other than the default "0". Try "bfactor" : 8, "bsleep" : 25, then restart xmr-stak.


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