Intel® Core™ i9-11900K

The Intel Core i9-11900K is a desktop processor with 8 cores and 16 threads, built on the Rocket Lake architecture (14 nm process). It launched in Jan 2021. Clocks run from 3.5 GHz base to 5.3 GHz boost. A 16-MB L3 cache backs the cores (2.6 MB per core). It addresses DDR4 memory up to 128 GB across 2 channels. The chip drops into the FCLGA1200 socket and exposes PCIe 4.0 (20 lanes). Rated TDP is 125 W. Notable platform capabilities: Gaussian Neural Accelerator, AVX-512, Extended Page Tables (EPT), Control-flow Enforcement (CET).

The Intel Core i9-11900K scores 3,501 in single-core performance and 24,894 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 9,336 for overall performance, 21,083 for productivity performance, 19,994 for creator performance, 25,516 for engineering performance and 16,727 for gaming performance. Its multi-core throughput works out to 3,112 per core, 1,556 per thread and 199 per watt. Its computed efficiency index is 835. Its performance index is 116, so its overall performance is 16% above the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Scores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.

In the individual workload tests the Intel Core i9-11900K scores 88,874 in integer math, 52,691 in floating-point math, 328,608 in compression, 15,830 in cryptography, 1,046 in physics simulation, 23,265 in vector SIMD, 67 in the prime sieve and 37,854 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 51% above in integer math, 15% above in floating-point math, 44% above in compression, 38% above in cryptography, 4% below in physics simulation, 50% above in vector SIMD, equal in the prime sieve and 67% above in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.

The Intel Core i9-11900K has 8 physical cores and runs 16 logical threads. It runs 2 threads per core. It runs at a base clock of 3.50 GHz and boosts up to 5.30 GHz.

The Intel Core i9-11900K is a desktop processor, belongs to the Intel Core i9 family, uses the Rocket Lake architecture, carries the codename Rocket Lake and is manufactured on a 14 nm process. It launched in Jan 2021.

The Intel Core i9-11900K has 640 KB of L1 cache, 4 MB of L2 cache and 16 MB of L3 cache. That adds up to about 20.6 MB of cache, or 2.58 MB per core. Each core has 512 KB of private L2 cache.

The Intel Core i9-11900K has a 3-level cache hierarchy: L1 at 640 KB, L2 at 4 MB and L3 at 16 MB. L3 is the largest level and makes up about 78% of the cache listed here.

The Intel Core i9-11900K supports DDR4 memory, addresses up to 128 GB of memory and uses 2 memory channels. It does not support DDR5 and LPDDR memory.

The Intel Core i9-11900K includes integrated graphics (Intel UHD Graphics 750) and clocks the graphics up to 1.30 GHz.

The Intel Core i9-11900K uses the FCLGA1200 socket, supports PCI Express 4.0 and provides up to 20 PCIe lanes.

The Intel Core i9-11900K has a rated TDP of 125 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

The Intel Core i9-11900K is manufactured by Intel. It launched at a price of $593.

The Intel Core i9-11900K is also identified by the model number i9-11900K.

After an audit, 1 value was corrected and 1 empty field was filled on the Intel Core i9-11900K record. Each change is listed with its old value, new value, rule and sources.

• L2 cache (total): 512 KB → 4,096 KB. Rule: L2 cache was stored per core. stored equals the per-core size in PassMark "8 x 512 KB". Sources: Vendor page (intel.com); PassMark: Intel Core i9-11900K @ 3.50GHz; Wikipedia: List of Intel Core desktop processors (revision 1371607091).

The audit log is public: all changes for this CPU, the corrections overview and the method.

Feex has recorded 63% of the specifications it tracks for the Intel Core i9-11900K. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, Hybrid Architecture, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L4 Cache. Memory Support: Memory Bandwidth, ECC Memory and Max Memory Speed. Graphics: Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package and Package Size. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count and Foundry. Naming & Aliases: Normalized Name, SKU, Processor Number and Part Number.

Processors that use the same FCLGA1200 socket as the Intel Core i9-11900K and have the closest multi-core scores in the Feex database include Intel Xeon W-1390P, Intel Core i9-11900KF, Intel Core i7-11700K, Intel Core i7-11700KF and Intel Xeon E-2388G.