i9-11900KB vs Ryzen 9 PRO 3900
Aggregate performance score
Ryzen 9 PRO 3900 outperforms Core i9-11900KB by a substantial 38% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 9 PRO 3900 and Core i9-11900KB processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 286 | 501 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 17.86 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 9 | no data |
| Power efficiency | 28.97 | 20.99 |
| Architecture codename | Zen 2 (2017−2020) | Tiger Lake-H (2021) |
| Release date | 30 September 2019 (5 years ago) | May 2021 (3 years ago) |
| Launch price (MSRP) | no data | $539 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 9 PRO 3900 and Core i9-11900KB basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 12 (Dodeca-Core) | 8 (Octa-Core) |
| Threads | 24 | 16 |
| Base clock speed | 3.1 GHz | 3.3 GHz |
| Boost clock speed | 4.3 GHz | 4.9 GHz |
| Bus rate | no data | 8 GT/s |
| L1 cache | 768 KB | 80K (per core) |
| L2 cache | 6 MB | 1.25 MB (per core) |
| L3 cache | 64 MB | 24 MB (shared) |
| Chip lithography | 7 nm, 12 nm | 10 nm SuperFin |
| Die size | no data | 190 mm2 |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 9 PRO 3900 and Core i9-11900KB compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 (Uniprocessor) | 1 |
| Socket | Socket AM4 | FCBGA1787 |
| Power consumption (TDP) | 65 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 9 PRO 3900 and Core i9-11900KB. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Speed Shift | no data | + |
| Hyper-Threading Technology | no data | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Turbo Boost Max 3.0 | no data | + |
| Precision Boost 2 | + | no data |
| Deep Learning Boost | - | + |
Security technologies
Ryzen 9 PRO 3900 and Core i9-11900KB technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | no data | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 9 PRO 3900 and Core i9-11900KB are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 9 PRO 3900 and Core i9-11900KB. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR4 |
| Maximum memory size | 128 GB | 128 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 51.196 GB/s | 51.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | Intel UHD Graphics for 11th Gen Intel Processors |
| Quick Sync Video | - | + |
| Graphics max frequency | - | 1.45 GHz |
| Execution Units | - | 32 |
Graphics interfaces
Available interfaces and connections of Ryzen 9 PRO 3900 and Core i9-11900KB integrated GPUs.
| Number of displays supported | - | 4 |
Graphics image quality
Maximum display resolutions supported by Ryzen 9 PRO 3900 and Core i9-11900KB integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | - | + |
| Max resolution over HDMI 1.4 | - | 4096x2304@60Hz |
| Max resolution over eDP | - | 4096 x 2304@60Hz |
| Max resolution over DisplayPort | - | 7680x4320@60Hz |
Graphics API support
APIs supported by Ryzen 9 PRO 3900 and Core i9-11900KB integrated GPUs, sometimes API versions are included.
| DirectX | - | 12 |
| OpenGL | - | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Ryzen 9 PRO 3900 and Core i9-11900KB.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 20 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 19.90 | 14.42 |
| Physical cores | 12 | 8 |
| Threads | 24 | 16 |
| Chip lithography | 7 nm | 10 nm |
Ryzen 9 PRO 3900 has a 38% higher aggregate performance score, 50% more physical cores and 50% more threads, and a 42.9% more advanced lithography process.
The Ryzen 9 PRO 3900 is our recommended choice as it beats the Core i9-11900KB in performance tests.
Should you still have questions on choice between Ryzen 9 PRO 3900 and Core i9-11900KB, ask them in Comments section, and we shall answer.
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