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TechPowerUp records power consumption directly, rather than using any onboard or integrated sensors. In the case of their 13900K review, the figures are taken from the two ATX 12V sockets on the motherboard -- these supply bulk of power for the CPU.Good find however, their wattage numbers says GPU only? "Card Only"
13900K can use alot of watts, in gaming tho, it's probably "only" 100-150 watts tops
The process of adding the additional layer of cache is probably the biggest additional cost, but the extra silicon limits the thermal properties of the CPU. For example, the Tjunction maximum for the 7950X is 95C whereas it's 89C for the 7950X3D. Applying the cache to both CCDs would lower this, and the clock speeds, even further -- AMD probably found that the decreases negated some/a lot of the benefits the cache brings.Why did AMD do this? Is 3D cache expensive?