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

Core i5-8400H vs Core i7-1355U benchmarks

Our benchmark analysis concludes that the Core i7-1355U performs better than the Core i5-8400H. Furthermore, our gaming benchmark shows that it also outperforms the Core i5-8400H in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Core i7-1355U has significantly more cores than the Core i5-8400H. Indeed, the Core i7-1355U has 10 cores compared to 4 cores found in the Core i5-8400H. It also has more threads than the Core i5-8400H. Our comparison shows that the Core i5-8400H 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 cache sizes of these CPUs are different. Indeed, the Core i7-1355U has significantly more L2 cache than the Core i5-8400H. However, both these chips have the same amount of 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. Indeed, the Core i5-8400H has more threads than cores. Each physical core is split into multiple threads.