You’re on a slightly older image, you can either download the latest stable and reflash your drive with that, or in shell use hive-replace -s
To flash it from the rig itself (easiest way)
Bios looks pretty recent, but worth check in gif there’s any updates on your manufacturers support site.
To use locked core clocks all you have to do is erase your -200 and replace with a value above 500. If your cards are lhr typically 1500mhz is a good starting point, if they’re not lhr the goal is to find the lowest core clock that maintains maximum hashrate. That could be anywhere between 900 and 1500mhz.