GPU utilization oscillates when cracking a rar3-p hash

[Chick3nman]

Sounds like your dictionary is relatively small and/or your host is having trouble streaming it to the GPU sufficiently. The speed bump is likely because there's a period where the GPU is left without work while it waits for the host to send it the next batch of candidates.

https://hashcat.net/wiki/doku.php?id=fre...full_speed