Core i5-9400 vs Core Ultra 7 155U specs and performance
In our benchmarks, the Core Ultra 7 155U beats the Core i5-9400 in overall performance. Despite this, the Core i5-9400 has the advantage in our gaming benchmark.
In terms of the number of cores of each of these CPUs, the Core Ultra 7 155U has significantly more cores than the Core i5-9400. Indeed, the Core Ultra 7 155U has 12 cores compared to 6 cores found in the Core i5-9400. It also has more threads than the Core i5-9400. These CPUs have different clock speeds. Indeed, the Core i5-9400 has a slightly higher clock speed compared to the Core Ultra 7 155U. The cache sizes of these CPUs are different. Indeed, the Core Ultra 7 155U has significantly more L2 cache than the Core i5-9400. The Core Ultra 7 155U 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.
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