I'm using the following tutorial on setting up my old PC for CPU mining of XMR (Monero) with Claymore CPU miner:
https://xmr.nanopool.org/help

I'm using the following command line:
C:\Users\mnrpc\Desktop\clmr\NsCpuCNMiner64.exe -o stratum+ssl://xmr-eu1.nanopool.org:14433 -u key.id.name/email -p x -pow7 1

The miner starts up and runs fine, but its CPU utilization doesn't go above 50%:

https://i.imgur.com/envWw2Y.png


It's a designated PC that's not used for anything else. Is there a way to make it use more CPU on it?