[Dylan16807]

No, don't turn it off. One thread on a core will go full speed, and two threads on a core will do more work than one thread. It's just that your utilization graph will be misleading. A naive graph will assume that two threads do twice as much work as one, but the real improvement is much smaller.

If you turn off hyperthreading and keep the same exact workload, then instead of "the graph says 50% but it's really more like 80-90%", you'll have "the graph says 100% and it's correct". The numbers now accurately represent your lower capacity.