i9-11900K vs Xeon Platinum 8156
Primary details
Comparing Xeon Platinum 8156 and Core i9-11900K processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 428 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 18.92 |
| Market segment | Server | Desktop processor |
| Series | Intel Xeon Platinum | no data |
| Power efficiency | no data | 12.01 |
| Architecture codename | Skylake (server) (2017−2018) | Rocket Lake (2021) |
| Release date | 25 April 2017 (7 years ago) | 16 March 2021 (3 years ago) |
| Launch price (MSRP) | $7,007 | $539 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Xeon Platinum 8156 and Core i9-11900K 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 | 4 (Quad-Core) | 8 (Octa-Core) |
| Threads | 8 | 16 |
| Base clock speed | 3.6 GHz | 3.5 GHz |
| Boost clock speed | 3.7 GHz | 5.2 GHz |
| Bus rate | no data | 8 GT/s |
| Multiplier | 36 | no data |
| L1 cache | 256 KB | 80 KB (per core) |
| L2 cache | 4 MB | 512 KB (per core) |
| L3 cache | 16.5 MB | 16 MB (shared) |
| Chip lithography | 14 nm | 14 nm |
| Die size | no data | 276 mm2 |
| Maximum core temperature | 71 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Xeon Platinum 8156 and Core i9-11900K 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 | 8 (Multiprocessor) | 1 |
| Socket | FCLGA3647 | FCLGA1200 |
| Power consumption (TDP) | 105 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon Platinum 8156 and Core i9-11900K. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | + | no data |
| Turbo Boost Technology | 2.0 | 2.0 |
| Hyper-Threading Technology | + | + |
| TSX | + | + |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| SIPP | - | + |
| Turbo Boost Max 3.0 | - | + |
| Deep Learning Boost | - | + |
Security technologies
Xeon Platinum 8156 and Core i9-11900K technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | - |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon Platinum 8156 and Core i9-11900K are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon Platinum 8156 and Core i9-11900K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2666 | DDR4 |
| Maximum memory size | 768 GB | 128 GB |
| Max memory channels | 6 | 2 |
| Maximum memory bandwidth | 128.001 GB/s | 50 GB/s |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel UHD Graphics 750 |
| Max video memory | no data | 64 GB |
| Quick Sync Video | - | + |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.3 GHz |
| Execution Units | no data | 32 |
| InTru 3D | no data | + |
Graphics interfaces
Available interfaces and connections of Xeon Platinum 8156 and Core i9-11900K integrated GPUs.
| Number of displays supported | no data | 3 |
Graphics image quality
Maximum display resolutions supported by Xeon Platinum 8156 and Core i9-11900K integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2160@60Hz |
| Max resolution over eDP | no data | 5120 x 3200 @60Hz |
| Max resolution over DisplayPort | no data | 5120 x 3200 @60Hz |
Graphics API support
APIs supported by Xeon Platinum 8156 and Core i9-11900K integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.1 |
| OpenGL | no data | 4.5 |
Peripherals
Specifications and connection of peripherals supported by Xeon Platinum 8156 and Core i9-11900K.
| PCIe version | 3.0 | 4.0 |
| PCI Express lanes | 48 | 20 |
Pros & cons summary
| Recency | 25 April 2017 | 16 March 2021 |
| Physical cores | 4 | 8 |
| Threads | 8 | 16 |
| Power consumption (TDP) | 105 Watt | 125 Watt |
Xeon Platinum 8156 has 19% lower power consumption.
i9-11900K, on the other hand, has an age advantage of 3 years, and 100% more physical cores and 100% more threads.
We couldn't decide between Xeon Platinum 8156 and Core i9-11900K. We've got no test results to judge.
Be aware that Xeon Platinum 8156 is a server/workstation processor while Core i9-11900K is a desktop one.
Should you still have questions on choice between Xeon Platinum 8156 and Core i9-11900K, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
