Question about Core i9-10900KF - 431189

K= unlocked, overclocking possible, Intel® Extreme Tuning Utility (Intel® XTU).
F= no graphics unit integrated, requires separate graphics card

Both are not relevant for gaming and the iGPU can be switched off in the BIOS.
But with no F, you have the advantage that you can connect the monitor without a graphics card, which is practical if something breaks.