Jeff_Fortuna

I thought it would be interesting to add a dissenting data point here. On my system - 9900k with a 2080 ti and very high settings at 4k, turning off HT is a total disaster. It causes long stutters of up to a couple of seconds as core 0 is overloaded. With HT on, the load is spread quite evenly over all 8 physical cores with good usage of hyperthreading. This is exactly what I would expect. Regardless of what threading library is used, HT should be handled intelligently. It may not work well in all situations - and on all systems - however, on average it shouldn't cause major problems. Therefore I would suspect that if, on a 9900k, P3D runs much better with HT off, something is wrong somewhere. I'm not denying that HT off may work better for some, but if one has a 9900k, I would encourage these folks to push the system harder and then try to figure out why the system doesn't run better with HT on. In other words, try to take advantage of what HT offers.