Testing Ryzen 9 with SMT On vs. SMT Off

When we compared AMD's Ryzen 9 3900X gaming head to head against the Core i9-9900K we found that the 12-core AMD processor was about 6% slower. We've been requested by readers to retest the 3900X with SMT disabled, essentially turning the 12-core, 24-thread CPU into a 12-core, 12-thread CPU. Many say this can significantly improve gaming performance... but why?





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