3 ms·
In that particular benchmark (3d particle movement), the 11700K performed about 4x better than the AMD 5900X. Performance/watt clearly wasn't suffering. Perhap
by celrod 5y ago
In that particular benchmark (3d particle movement), the 11700K performed about 4x better than the AMD 5900X. Performance/watt clearly wasn't suffering.
Perhaps it could downlock more to address the wattage while still coming well ahead in terms of performance, although some older CPUs doing this gave AVX512 a bad reputation.
Few workloads are as well optimized to take advantage of AVX512 as the 3d particle movement benchmark, so both the increases in performance and wattage seen in that benchmark are atypical.
If they were typical, then AVX512 would be much more popular.
FWIW, I'm a big fan of wide CPU vector instructions. The real reason it was disabled is probably to push people like me to buy Saphire Rapids, which I would've favored anyway for the extra FMA unit. Although I'll also be waiting to see if Zen4 brings AVX512, which some rumors have claimed (and others have contradicted).
- GeekyBear 5y agoOne of the failure modes for chips as they move to smaller process nodes is electromigration. >Electromigration is the movement of atoms based on the flow of current through a material. If the current density is high enough, the heat dissipated within the material will repeatedly break atoms from the structure and move them. This will create both ‘vacancies’ and ‘deposits’. The vacancies can grow and eventually break circuit connections resulting in open-circuits, while the deposits can grow and eventually close circuit connections resulting in short-circuit. Chips that get very hot are expected to be the first to show this sort of failure. >In Black’s equation, which is used to compute the mean time to failure of metal lines, the temperature of the conductor appears in the exponent https://www.synopsys.com/glossary/what-is-electromigration.html https://www.synopsys.com/glossary/what-is-electromigration.h...