Intel Core i5-10400 vs Intel Core Ultra 5 135U

Core i5-10400 vs Core Ultra 5 135U benchmarks

Our benchmark analysis concludes that the Core Ultra 5 135U performs better than the Core i5-10400. Furthermore, our gaming benchmark shows that it also outperforms the Core i5-10400 in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Core Ultra 5 135U has significantly more cores than the Core i5-10400. Indeed, the Core Ultra 5 135U has 12 cores compared to 6 cores found in the Core i5-10400. It also has more threads than the Core i5-10400. Our comparison shows that the Core i5-10400 has a slightly higher clock speed compared to the Core Ultra 5 135U. Despite this, the Core Ultra 5 135U has a slightly higher turbo speed. The cache sizes of these CPUs are different. Indeed, the Core Ultra 5 135U has significantly more L2 cache than the Core i5-10400. 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 i5-10400 has more threads than cores. Each physical core is split into multiple threads.