Intel Core i5-9400 vs Intel Core i5-1235U

Core i5-9400 vs Core i5-1235U comparison

In our benchmarks, the Core i5-1235U beats the Core i5-9400 in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i5-9400 in all gaming tests too.

With info from our database, we find that the Core i5-1235U has significantly more cores with 10 cores whereas the Core i5-9400 has 6 cores. It also has more threads than the Core i5-9400. These CPUs have different clock speeds. Indeed, the Core i5-9400 has a significantly higher clock speed compared to the Core i5-1235U. Despite this, the Core i5-1235U has a slightly higher turbo speed. The Core i5-1235U outputs less heat than Core i5-9400 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 i5-1235U has significantly more L2 cache than the Core i5-9400. The Core i5-1235U also has slightly more L3 cache.

The more cores a CPU has, the better the overall performance will be in parallel workloads such as multitasking. Many CPUs have more threads than cores, this means that each physical core is split into multiple logical cores, making them more efficient. For instance, the Core i5-9400 has the same number of threads as cores. This means the the CPU does not support hyperthreading.