Intel Core i9-11900KB vs AMD Ryzen 9 5900X

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CPU comparison with benchmarks


Intel Core i9-11900KB CPU1 vs CPU2 AMD Ryzen 9 5900X
Intel Core i9-11900KB AMD Ryzen 9 5900X

CPU comparison

Intel Core i9-11900KB or AMD Ryzen 9 5900X - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The Intel Core i9-11900KB has 8 cores with 16 threads and clocks with a maximum frequency of 5.30 GHz. Up to 128 GB of memory is supported in 2 memory channels. The Intel Core i9-11900KB was released in Q2/2021.

The AMD Ryzen 9 5900X has 12 cores with 24 threads and clocks with a maximum frequency of 4.80 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The AMD Ryzen 9 5900X was released in Q4/2020.
Intel Core i9 (78) Family AMD Ryzen 9 (34)
Intel Core i 11000H (17) CPU group AMD Ryzen 5000 (12)
11 Generation 4
Tiger Lake H Architecture Vermeer (Zen 3)
Mobile Segment Desktop / Server
-- Predecessor AMD Ryzen 9 3900X
-- Successor AMD Ryzen 9 7900X

CPU Cores and Base Frequency

The Intel Core i9-11900KB is a 8 core processor with a clock frequency of 3.30 GHz (5.30 GHz). The AMD Ryzen 9 5900X has 12 CPU cores with a clock frequency of 3.70 GHz (4.80 GHz).

Intel Core i9-11900KB Characteristic AMD Ryzen 9 5900X
8 Cores 12
16 Threads 24
normal Core architecture normal
Yes Hyperthreading Yes
Yes Overclocking ? Yes
3.30 GHz Frequency 3.70 GHz
5.30 GHz Turbo Frequency (1 Core) 4.80 GHz
4.90 GHz Turbo Frequency (All Cores) 4.50 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 i9-11900KB Characteristic AMD Ryzen 9 5900X
-- AI hardware --
-- AI specifications --

Internal Graphics

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.

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

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.

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

Memory & PCIe

The Intel Core i9-11900KB supports a maximum of 128 GB of memory in 2 memory channels. The AMD Ryzen 9 5900X can connect up to 128 GB of memory in 2 memory channels.

Intel Core i9-11900KB Characteristic AMD Ryzen 9 5900X
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 Yes
4.00 MB L2 Cache 6.00 MB
20.00 MB L3 Cache 64.00 MB
3.0 PCIe version 4.0
16 PCIe lanes 20
15.8 GB/s PCIe Bandwidth 39.4 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core i9-11900KB has a TDP of 65 W, that of the AMD Ryzen 9 5900X is 105 W.

Intel Core i9-11900KB Characteristic AMD Ryzen 9 5900X
65 W TDP (PL1 / PBP) 105 W
-- TDP (PL2) 142 W
-- TDP up --
55 W TDP down --
100 °C Tjunction max. 90 °C

Technical details

The Intel Core i9-11900KB has a 24.00 MB cache, while the AMD Ryzen 9 5900X cache has a total of 70.00 MB.

Intel Core i9-11900KB Characteristic AMD Ryzen 9 5900X
10 nm Technology 7 nm
Monolithic Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2, AVX-512 ISA extensions SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
BGA 1787 Socket AM4 (PGA 1331)
VT-x, VT-x EPT, VT-d Virtualization AMD-V, SVM
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 10, Windows 11, Linux
Q2/2021 Release date Q4/2020
583 $ Release price 549 $
show more data show more data


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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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
1663 (100%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
1636 (98%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
12264 (56%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
21878 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
1878 (100%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
1727 (92%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
2231 (100%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
2199 (99%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
10645 (84%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
12637 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
640 (100%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
637 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
4712 (55%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
8491 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
23151 (59%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
39295 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
256 (95%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
270 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
2144 (58%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
3684 (100%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
98 (100%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core i9-11900KB Intel Core i9-11900KB
8C 16T @ 5.30 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.80 GHz
1189 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
14515 (100%)

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 i9-11900KB Intel Core i9-11900KB
Intel UHD Graphics 11th Gen (32 EU) @ 1.45 GHz
742 (100%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
@ 0.00 GHz
0 (0%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
308 (100%)

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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
200 (100%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
0 (0%)

CPU-Z Benchmark 17 (Single-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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 4.90 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 4.50 GHz
647 (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 i9-11900KB Intel Core i9-11900KB
8C 16T @ 3.30 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
12C 24T @ 3.70 GHz
9520 (100%)

CPU performance per watt (efficiency)

Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
Intel Core i9-11900KB Intel Core i9-11900KB
3.30 GHz
0 (0%)
AMD Ryzen 9 5900X AMD Ryzen 9 5900X
21,878 CB R23 MC @ 131 W
167 (100%)

Devices using this processor

Intel Core i9-11900KB AMD Ryzen 9 5900X
Unknown Unknown

News and articles for the Intel Core i9-11900KB and the AMD Ryzen 9 5900X

Why the new AMD Ryzen 7000 processors for the AM5 socket are currently not a good deal
Why the new AMD Ryzen 7000 processors for the AM5 socket are currently not a good deal
Posted by Stefan on 2022-10-11
At the end of September 2022, the time had come: AMD presented its latest desktop processors called AMD Ryzen 7000. Initially, 4 processors with 6 to 16 CPU cores were released.

The new socket AM5 (LGA 1718) is used for the first time, which is intended to replace the very durable socket AM4 introduced in 2017 as AMDs mainstream platform. This includes (depending on the chipset) PCIe 5.0 support as well as the exclusive use of DDR5 memory on all AM5 mainboards.

Officially, DDR5-5200 is the maximum, but with AMDs EXPO Technology which is similar to Intel's XMP 3.0, AMD now also has a solution for easy overclocking of the main memory. AMD itself names DDR5-6000 as the sweet spot for the new AMD Ryzen 7000 processors.
Most popular processors in the first half of 2022
Most popular processors in the first half of 2022
Posted by Stefan on 2022-07-05
In the past we had repeatedly written about our most popular processors. Since this format was quiet popular, I would like to continue this today and introduce you the most popular processors in the first half of 2022.

With more than 2 million page views per month, CPU-Monkey is one of the biggest comparison sites for processors and is currently available in 16 languages.
AMD Ryzen 5 7600X and AMD Ryzen 7 7800X are coming in September
AMD Ryzen 5 7600X and AMD Ryzen 7 7800X are coming in September
Posted by Stefan on 2022-06-20
After we published a performance assessment of the AMD Ryzen 9 7950X last week, the well-known AMD leaker Greymon55 has now posted more informations via Twitter.

He predicts the first four models of the new Zen 4 desktop generation, which AMD would like to present at the end of 2022. There is also an alleged release date of September 15, 2022.
AMD Ryzen 9 7950X - Cinebench R23 Benchmark projection
AMD Ryzen 9 7950X - Cinebench R23 Benchmark projection
Posted by Stefan on 2022-06-10
We give you a preview of AMD's new Zen 4 desktop processors and calculate the performance of the AMD Ryzen 9 7950X top model for the new AM5 socket. The performance data and other technical details come directly from the press kit that AMD released as part of its Financial Analyst Day on June 9, 2022.

Up to 15 percent more single-core performance and 35 percent more multi-core performance of the 16-core model are realistic !

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