Intel Core i5-11400 vs Intel Core i7-1255U

Core i5-11400 vs Core i7-1255U specs and performance

In our benchmarks, the Core i5-11400 beats the Core i7-1255U in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i7-1255U in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Core i7-1255U has significantly more cores than the Core i5-11400. Indeed, the Core i7-1255U has 10 cores compared to 6 cores found in the Core i5-11400. But they both have the same number of threads. These CPUs have different clock speeds. Indeed, the Core i5-11400 has a significantly higher clock speed compared to the Core i7-1255U. Despite this, the Core i7-1255U has a slightly higher turbo speed. The Core i7-1255U outputs less heat than Core i5-11400 thanks to a significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. In terms of cache, the Core i7-1255U has slightly more L2 cache when compared to the Core i5-11400. 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 i5-11400 has more threads than cores. Each physical core is split into multiple threads.