The K, KF, F suffix difference of Intel CPU models is mainly experienced in whether it is equipped with a core display and whether it can be overclocked. For example, the i5-11400F does not have a kernel and cannot overclock, such as the suffix K means equipped with a kernel and can overclock, such as the suffix KF means not equipped with a kernel but can overclock.
In this paper, DIY desktop host; Windows10 explains the case.
1. The suffix K indicates that the CPU model is equipped with a core display and can be overclocked. For example, i5-11600K, i7-11700K, i9-11900K, etc.
2. The KF suffix of the CPU model indicates that it is not equipped with a check but can overclock. Such as i5-11600KF, i7-11700KF, i9-11900KF and so on.
3. The suffix F indicates that the CPU model is not equipped with a core display and cannot be overclocked. Such as i5-11400F, i7-11700F, i9-11900F, etc.
The difference between the cpu with k and f: the CPU with K means that it can be overclocked, the CPU with F means that there is no \"core graphics card\