Intel Core i5-8400T vs Intel Core i7-3940XM

Core i5-8400T vs Core i7-3940XM specs and performance

In our benchmarks, the Core i5-8400T beats the Core i7-3940XM in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Core i7-3940XM in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Core i5-8400T has significantly more cores than the Core i7-3940XM. Indeed, the Core i5-8400T has 6 cores compared to 4 cores found in the Core i7-3940XM. Despite this, the Core i7-3940XM has more threads than the Core i5-8400T. Our comparison shows that the Core i7-3940XM has a significantly higher clock speed compared to the Core i5-8400T. Also, the Core i7-3940XM has a slightly higher turbo speed. A Core i5-8400T CPU outputs less heat than a Core i7-3940XM CPU because of its 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 i5-8400T has significantly more L2 cache when compared to the Core i7-3940XM. The Core i5-8400T 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 i5-8400T has the same number of threads as cores. This means the the CPU does not support hyperthreading.