Intel Core i5-8400 vs Intel Core i7-1355U

Core i5-8400 vs Core i7-1355U specs and performance

Our benchmark analysis concludes that the Core i7-1355U performs better than the Core i5-8400. Despite this, the Core i5-8400 has the advantage in our gaming benchmark.

With info from our database, we find that the Core i7-1355U has significantly more cores with 10 cores whereas the Core i5-8400 has 6 cores. It also has more threads than the Core i5-8400. Our comparison shows that the Core i5-8400 has a significantly higher clock speed compared to the Core i7-1355U. Despite this, the Core i7-1355U has a slightly higher turbo speed. The info from our database shows that the Core i7-1355U has more L2 cache than the Core i5-8400. The Core i7-1355U also has slightly more L3 cache.

Most CPUs have more threads than cores. This technology, colloquially called hyperthreading, improves performance by splitting a core into multiple virtual ones. This provides more efficient utilisation of a core. For instance, the Core i5-8400 has the same number of threads as cores. This means the the CPU does not support hyperthreading.