Intel® Core™ i9-11900KB

The Intel Core i9-11900KB is a desktop processor with 8 cores and 16 threads (10 nm process). It launched in May 2021. Clocks run from 3.3 GHz base to 4.9 GHz boost. A 24-MB L3 cache backs the cores (4.3 MB per core). It supports DDR4 memory. The chip drops into the FCBGA1787 socket and exposes PCIe 4.0 (20 lanes). Rated TDP is 65 W. Notable platform capabilities: AVX-512, Extended Page Tables (EPT), Control-flow Enforcement (CET).

The Intel Core i9-11900KB scores 3,296 in single-core performance and 22,710 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 8,652 for overall performance, 19,376 for productivity performance, 18,423 for creator performance, 23,278 for engineering performance and 15,566 for gaming performance. Its multi-core throughput works out to 2,839 per core, 1,419 per thread and 349 per watt. Its computed efficiency index is 1,073. Its performance index is 107, so its overall performance is 7% 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 i9-11900KB scores 78,871 in integer math, 46,924 in floating-point math, 265,462 in compression, 13,623 in cryptography, 1,161 in physics simulation, 18,036 in vector SIMD, 103 in the prime sieve and 31,772 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 34% above in integer math, 2% above in floating-point math, 16% above in compression, 19% above in cryptography, 7% above in physics simulation, 16% above in vector SIMD, 54% above in the prime sieve and 40% 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 i9-11900KB has 8 physical cores and runs 16 logical threads. It does not use a hybrid performance and efficiency core layout. It runs 2 threads per core. It runs at a base clock of 3.30 GHz and boosts up to 4.90 GHz.

The Intel Core i9-11900KB is a desktop processor, belongs to the Intel Core i9 family and is manufactured on a 10 nm process. It launched in May 2021.

The Intel Core i9-11900KB has 640 KB of L1 cache, 10 MB of L2 cache and 24 MB of L3 cache. That adds up to about 34.6 MB of cache, or 4.33 MB per core. Each core has 1.25 MB of private L2 cache.

The Intel Core i9-11900KB has a 3-level cache hierarchy: L1 at 640 KB, L2 at 10 MB and L3 at 24 MB. L3 is the largest level and makes up about 69% of the cache listed here.

The Intel Core i9-11900KB supports DDR4 memory, uses 2 memory channels, runs memory at up to 3,200 MT/s and delivers up to 51.2 GB/s of memory bandwidth. It does not support DDR5 and LPDDR memory.

The Intel Core i9-11900KB includes integrated graphics (UHD Graphics) and clocks the graphics up to 1.45 GHz.

The Intel Core i9-11900KB uses the FCBGA1787 socket, supports PCI Express 4.0 and provides up to 20 PCIe lanes.

The Intel Core i9-11900KB has a rated TDP of 65 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 i9-11900KB is manufactured by Intel. It launched at a price of $539.

Feex has recorded 62% of the specifications it tracks for the Intel Core i9-11900KB. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: Codename, ISA Family and Market Status. Cache: L4 Cache. Memory Support: ECC Memory. 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: SKU, Model Number, Processor Number and Part Number.

Processors that use the same FCBGA1787 socket as the Intel Core i9-11900KB and have the closest multi-core scores in the Feex database include Intel Core i9-11980HK, Intel Xeon W-11955M, Intel Core i7-11700B, Intel Core i7-11850HE and Intel Core i9-11950H.