The processor is a very early engineering sample that has been tested on the Intel 400-series board platform which might confirm that 11th Gen CPUs will be backward compatible on existing LGA 1200 socket motherboards. It features 8 cores, 16 threads and will feature clock speeds rated at 1.8 GHz base, 4.4 GHz boost (1-core), and 3.8 GHz (all-core boost). The Core i9-11900 will end up around 120-125W when it boosts to its max frequency. The CPU was tested on an MSI Z490I motherboard.
In CPU-z, the chip scores 582.1 points in the single-core and 5262 points in the multi-core tests. The Intel Core i9-10900K which boosts up to 5.3 GHz scores an average of 584 (1T) points while the Core i7-10700K scores 558 points. The Rocket Lake CPU is 4% faster than the Core i7-10700K and on par with the Core i9-10900K.
An updated benchmark was found by @OneRaichu which shows that Intel Core i9-11900 scores 597.3 points in single & 5686.2 points in the multi-threaded tests. The new score gives i9-11900 a 7% lead over the 10700K and a 2% lead over the 10900K in single-core tests. Whereas, in multi-threaded benchmarks, the Core i9-10900K scores 7386 points while the Core i7-10700K scores 5661 points. Here, the Intel Core i7-10700K ends up 9% faster than the i9-11900(older benchmark) while the Core i9-10900K leads are greatly increased.