Intel Core i5-8400H vs Intel Core i7-1265U

Core i5-8400H vs Core i7-1265U specs and performance

Our benchmark analysis concludes that the Core i7-1265U performs better than the Core i5-8400H. Despite this, the Core i5-8400H has the advantage in our gaming benchmark.

With info from our database, we find that the Core i7-1265U has significantly more cores with 10 cores whereas the Core i5-8400H has 4 cores. It also has more threads than the Core i5-8400H. These CPUs have different clock speeds. Indeed, the Core i5-8400H has a slightly higher clock speed compared to the Core i7-1265U. Despite this, the Core i7-1265U has a slightly higher turbo speed. The Core i7-1265U outputs less heat than Core i5-8400H thanks to a significantly lower TDP. This measures the amount of heat they output and can be used to estimate power consumption. The cache sizes of these CPUs are different. Indeed, the Core i7-1265U 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.