Intel® Core™ i9-12900KS

The Intel Core i9-12900KS is a desktop processor with a hybrid 16-core layout (8 performance cores + 8 efficiency cores) and 24 threads, built on the Alder Lake architecture (Intel 7 process). It launched in Jan 2022. Clocks run from 3.4 GHz base to 5.5 GHz boost. A 30-MB L3 cache backs the cores (2.8 MB per core). It addresses DDR5, DDR4 memory up to 128 GB across 2 channels. The chip drops into the FCLGA1700 socket and exposes PCIe 5.0 (20 lanes). Rated TDP is 150 W. Notable platform capabilities: Deep Learning Boost, AVX-VNNI, Extended Page Tables (EPT), AES-NI.

The Intel Core i9-12900KS scores 4,322 in single-core performance and 43,368 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 13,691 for overall performance, 34,240 for productivity performance, 31,632 for creator performance, 49,873 for engineering performance and 23,808 for gaming performance. Its multi-core throughput works out to 2,711 per core, 1,807 per thread and 289 per watt. Its computed efficiency index is 1,118. Its performance index is 170, so its overall performance is 70% 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 i9-12900KS scores 147,215 in integer math, 111,036 in floating-point math, 559,984 in compression, 31,229 in cryptography, 2,391 in physics simulation, 34,882 in vector SIMD, 155 in the prime sieve and 60,217 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 150% above in integer math, 142% above in floating-point math, 146% above in compression, 172% above in cryptography, 119% above in physics simulation, 125% above in vector SIMD, 131% above in the prime sieve and 166% 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 i9-12900KS has 16 physical cores and runs 24 logical threads. It uses a hybrid layout of 8 performance cores and 8 efficiency cores. It runs at a base clock of 3.40 GHz and boosts up to 5.50 GHz.

The Intel Core i9-12900KS is a desktop processor, belongs to the Intel Core i9 family, uses the Alder Lake architecture, carries the codename Alder Lake and is manufactured on a Intel 7 process. It launched in Jan 2022.

The Intel Core i9-12900KS has 1.38 MB of L1 cache, 14 MB of L2 cache and 30 MB of L3 cache. That adds up to about 45.4 MB of cache, or 2.84 MB per core.

The Intel Core i9-12900KS has a 3-level cache hierarchy: L1 at 1.4 MB, L2 at 14 MB and L3 at 30 MB. L3 is the largest level and makes up about 66% of the cache listed here.

The Intel Core i9-12900KS supports DDR5, DDR4 memory, addresses up to 128 GB of memory, uses 2 memory channels, runs memory at up to 4,800 MT/s and delivers up to 76.8 GB/s of memory bandwidth. It does not support LPDDR memory.

The Intel Core i9-12900KS includes integrated graphics (Intel UHD Graphics 770) and clocks the graphics up to 1.55 GHz.

The Intel Core i9-12900KS uses the FCLGA1700 socket, supports PCI Express 5.0 and provides up to 20 PCIe lanes.

The Intel Core i9-12900KS has a rated TDP of 150 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 i9-12900KS is manufactured by Intel. It launched at a price of $813.

The Intel Core i9-12900KS is also identified by the model number i9-12900KS.

Feex has recorded 64% of the specifications it tracks for the Intel Core i9-12900KS. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Threads per Core, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L2 Cache (per Core) and 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: Normalized Name, SKU, Processor Number and Part Number.

Processors that use the same FCLGA1700 socket as the Intel Core i9-12900KS and have the closest multi-core scores in the Feex database include Intel Core i9-13900T, Intel Core i9-13900, Intel Core i7-13790F, Intel Core i9-14900 and Intel Core i7-14700F.