Here is the comment you'll never find on any website about these processors.
I have bought this processor to test the "performance" it gives. Trust me it's nowhere near a real i7 8700K. First of all mounting the IC on the heatsink is a complicated process. Next comes the first boot and hopes it "all works". Even if it does boot the next step is overclocking the processor, because in stock mode it runs like i3 8100. Once the overclock is over and everything is fine and stable, the benchmark tests result in 101% i7 8700k scores you're then ready to fire up some games and play smooth, right? No, the issue lies in the following trick that no one has ever told. You won't get the FPS of a real i7 8700K in any game, and that's because the chip is not supposed to work with a normal desktop. It is meant for engineering the CPU. While the benchmarks of the CPU, yes, they do tell us we have i7 8700K, fine. What they don't tell us is how fast the CPU is with the peripherals, and well as you guessed, a game requires a good CPU as much as a good GPU. The GPU might be 3090, and the CPU 8700K, but the connection between will be PCIE 2.0 16X. But hey, after all it just lowers 1% of the FPS, so who cares right? Well, not quite. Even though we can change the pcie gen to 3.0 in BIOS, we will still suffer bottlenecks, not because of the lanes or PCIE gen or CPU or GPU clocks, but because of the way PCIE is implemented in the CPU and that is implemented for Engineering purposes, meaning it's first purpose is to function, but it's function is not optimized. Changing the physical implementation is not possible. Also I would like to add some SSD stutters and high access times. Plugging an USB 3.0, well just forget about seamless folder browsing. The transfer speeds are there, but the access times are hell.
In my opinion, it's just better to stick with an official sample of an Intel CPU rather than engineering sample. For some bucks more you'll be saved from the extra headaches this engineering sample will give to you. Trust me it's not worth the money, for the extra headaches it makes.
Ah, and I forgot to mention the occasional system crashes.