http://ir.amd.com/news-releases/news-release-details/amd-president-and-ceo-dr-lisa-su-reveals-coming-high-performance
AMD engineering sample silicon:Cinebench R15 2057cb wall power 134W
・Noctua NH-D15S
・AMD reference motherboard
・16GB (2x8) DDR4-2666 MHz memory
・512GB Samsung 850 PRO SSD
・AMD Radeon RX Vega 64 GPU, graphics driver 18.30.19.01 (Adrenalin 18.9.3)
・Microsoft Windows 10 Pro (1809)

Intel i9 9900K:Cinebench R15 2040cb wall power 191W
・Noctua NH-D15S
・Gigabyte Z390 Aorus
・16GB (2x8) DDR4-2666 MHz memory
・512GB Samsung 850 PRO SSD
・AMD Radeon RX Vega 64 GPU, graphics driver 18.30.19.01 (Adrenalin 18.9.3)
・Microsoft Windows 10 Pro (1809)

>for a difference of (191-134)/191=.298 or 30% lower power consumption.

これがCinebenchデモの構成
公平に比較してんじゃね