Intel Core i5-8400 vs Intel Core i3-9100

The Intel Core i5-8400 is based on the Coffee Lake S architecture and is aimed at mainstream desktop users who want balanced performance for gaming and multitasking.

It features 6 cores and 6 threads, 9 MB of L3 cache, and a maximum memory bandwidth of 43 GB/s. The Intel Core i3-9100 uses the Coffee Lake S Refresh architecture and is designed for budget-conscious users looking for a reliable processor for office work and media consumption.

It offers 4 cores and 4 threads, 6 MB of L3 cache, and 38 GB/s memory bandwidth. Both CPUs are manufactured using the 14nm process and support PCIe 3.0. Both integrate Intel UHD Graphics 630. The single-core performance of the Intel Core i3-9100 is marginally better in some recent tests, but the differences are small.

In multi-core applications, the Intel Core i5-8400 shows significantly superior performance thanks to its two additional cores. For gaming scenarios, the Intel Core i5-8400 offers advantages due to the higher core count, as many modern games benefit from more threads.

The Thermal Design Power (TDP) for both processors is 65 watts, indicating comparable cooling requirements and similar power consumption under load. In summary, the Intel Core i5-8400 is the better choice for gaming or demanding multitasking, as it benefits from its stronger multi-core performance and often offers a better price-performance ratio.

The Intel Core i3-9100 is ideal for basic productivity, web browsing, and media consumption, where its adequate single-core performance and lower cost are advantageous.