Core i9-7900X - Intel - WikiChip

Core i9-7900X is a 64-bit deca-core high-performance x86 desktop microprocessor introduced by Intel in mid-2017. This chip, which is based on the Skylake microarchitecture, is fabricated on Intel's enhanced 14nm+ process. The i9-7900X operates at 3.3 GHz with a TDP of 140 W and a Turbo Boost frequency of 4.3 GHz. The processor supports up to 128 GiB of quad-channel DDR4-2666 memory.

Core i7-7920HQ - Intel - WikiChip

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Ryzen - Wikipedia

Core i9 - Intel - WikiChip

If an i9 is basically an i3 with more cores (given they are from the same generation), then how are they both the same size physically? - Quora

AMD's Ryzen 7 3700X and Ryzen 9 3900X CPUs reviewed

Intel Core i9 7900X review: the best around, but the worst time to buy a high-end CPU

Skylake (server) - Microarchitectures - Intel - WikiChip

The Intel 9th Gen Review: Core i9-9900K, Core i7-9700K and Core i5-9600K Tested