Quote Originally Posted by jcool View Post
Because Intels linpack routine is about the only app out there that fully utilises all capabilities of the CPU. SMT was designed to boost performance for poorly coded/optimised (but multithreaded) applications, but when the CPU faces something as efficient as linpack, Hyperthreading actually backfires. Still causes your CPU to heat up more, so I'd leave it on for testing if you normally run with HT enbabled.
Cool, thanks for the info!