Intel Core i9-11900KF vs Intel Core i9-11900KB

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CPU comparison with benchmarks


Intel Core i9-11900KF CPU1 vs CPU2 Intel Core i9-11900KB
Intel Core i9-11900KF Intel Core i9-11900KB

CPU comparison

In this CPU comparison, we compare the Intel Core i9-11900KF and the Intel Core i9-11900KB and use benchmarks to check which processor is faster.

We compare the Intel Core i9-11900KF 8 core processor released in Q1/2021 with the Intel Core i9-11900KB which has 8 CPU cores and was introduced in Q2/2021.
Intel Core i9 (78) Family Intel Core i9 (78)
Intel Core i 11000 (22) CPU group Intel Core i 11000H (17)
11 Generation 11
Rocket Lake S Architecture Tiger Lake H
Desktop / Server Segment Mobile
Intel Core i9-10900KF Predecessor --
Intel Core i9-12900KF Successor --

CPU Cores and Base Frequency

The Intel Core i9-11900KF is a 8 core processor with a clock frequency of 3.50 GHz (5.30 GHz). The processor can compute 16 threads at the same time. The Intel Core i9-11900KB clocks with 3.30 GHz (5.30 GHz), has 8 CPU cores and can calculate 16 threads in parallel.

Intel Core i9-11900KF Characteristic Intel Core i9-11900KB
8 Cores 8
16 Threads 16
normal Core architecture normal
Yes Hyperthreading Yes
Yes Overclocking ? Yes
3.50 GHz Frequency 3.30 GHz
5.30 GHz Turbo Frequency (1 Core) 5.30 GHz
4.80 GHz Turbo Frequency (All Cores) 4.90 GHz

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

Intel Core i9-11900KF Characteristic Intel Core i9-11900KB
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

no iGPU GPU Intel UHD Graphics 11th Gen (32 EU)
GPU frequency 0.35 GHz
-- GPU (Turbo) 1.45 GHz
-- GPU Generation 11
Technology 10 nm
Max. displays 3
-- Compute units 32
-- Shader 256
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory 64 GB
-- DirectX Version 12

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

no iGPU GPU Intel UHD Graphics 11th Gen (32 EU)
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode / Encode
No Codec h264 Decode / Encode
No Codec VP9 Decode / Encode
No Codec VP8 Decode / Encode
No Codec AV1 Decode
No Codec AVC Decode / Encode
No Codec VC-1 Decode
No Codec JPEG Decode / Encode

Memory & PCIe

Up to 128 GB of memory in a maximum of 2 memory channels is supported by the Intel Core i9-11900KF, while the Intel Core i9-11900KB supports a maximum of 128 GB of memory with a maximum memory bandwidth of 51.2 GB/s enabled.

Intel Core i9-11900KF Characteristic Intel Core i9-11900KB
DDR4-3200 Memory DDR4-3200
128 GB Max. Memory 128 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
51.2 GB/s Max. Bandwidth 51.2 GB/s
No ECC No
4.00 MB L2 Cache 4.00 MB
16.00 MB L3 Cache 20.00 MB
4.0 PCIe version 3.0
20 PCIe lanes 16
39.4 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The Intel Core i9-11900KF has a TDP of 125 W. The TDP of the Intel Core i9-11900KB is 65 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i9-11900KF Characteristic Intel Core i9-11900KB
125 W TDP (PL1 / PBP) 65 W
251 W @ 56 s TDP (PL2) --
-- TDP up --
95 W TDP down 55 W
100 °C Tjunction max. 100 °C

Technical details

The Intel Core i9-11900KF has 20.00 MB cache and is manufactured in 14 nm. The cache of Intel Core i9-11900KB is at 24.00 MB. The processor is manufactured in 10 nm.

Intel Core i9-11900KF Characteristic Intel Core i9-11900KB
14 nm Technology 10 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2, AVX-512 ISA extensions SSE4.1, SSE4.2, AVX2, AVX-512
LGA 1200 Socket BGA 1787
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 10, Windows 11, Linux
Q1/2021 Release date Q2/2021
513 $ Release price 583 $
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Average performance in benchmarks

⌀ Single core performance in 5 CPU benchmarks
⌀ Multi core performance in 5 CPU benchmarks

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 5.30 GHz
1686 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
1663 (99%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
16211 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
12264 (76%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 5.30 GHz
1878 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
1878 (100%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 5.30 GHz
2349 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
2231 (95%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
11167 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
10645 (95%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 5.30 GHz
650 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
640 (98%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
6187 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
4712 (76%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
25385 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
23151 (91%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 5.30 GHz
262 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
256 (98%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
2515 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
2144 (85%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
11645 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
0 (0%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core i9-11900KF Intel Core i9-11900KF
@ 0.00 GHz
0 (0%)
Intel Core i9-11900KB Intel Core i9-11900KB
Intel UHD Graphics 11th Gen (32 EU) @ 1.45 GHz
742 (100%)

Blender 3.1 Benchmark

In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
243 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
0 (0%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 4.80 GHz
0 (0%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
200 (100%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i9-11900KF Intel Core i9-11900KF
8C 16T @ 3.50 GHz
6455 (100%)
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 3.30 GHz
0 (0%)

Devices using this processor

Intel Core i9-11900KF Intel Core i9-11900KB
Unknown Unknown

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