ISTR seeing some benchmarks where using AVX512 really hurts your throughput if you're running multithreaded code. Again, vague memory, but the reason was that

ISTR seeing some benchmarks where using AVX512 really hurts your throughput if you're running multithreaded code. Again, vague memory, but the reason was that it winds up heating up the core that's running the AVX512 code and causing all the other cores to thermally throttle.