https://www.tomshardware.com/news/intel-core-i9-9900f-cpu-specs,38846.html
 
The Core i9-9900F, as caught in SiSoft's Sandra, is likely simply a locked-down version of Intel's Core i9-9900, since delidding of Intel's Core i5-9400F has shown that the silicon real-estate for the iGPU is still there - as such, this likely isn't an effort from Intel to reduce the silicon used for graphics and pass on the savings to customers. At the most, this is Intel launching products that may carry defective iGPUs from the production process and still be able to sell them - though Intel does seem to be looking not to budge on its profit margin, even on these "crippled" CPUs.
 
The 9900F should feature the same eight-core, 16-thread design and 16 MB L3 cache and a locked multiplier, but as reported by SiSoftware, its clockspeeds could have taken a hit as well: according to the software, the i9-9900F features a 3.1 GHz base clock speed, some 500 MHz lower than the "K" and "KF" variants. However, the chip does seem to be able to reach 5 GHz on two cores and 4.8 GHz on four cores. Either that or incorrect reporting from the software itself - or even the fact that the CPU is being run at non-final clockspeeds. 
 
Interesting how Intel manages to make money off of these crippled CPUs.