Xeon Platinum 8256 vs i9-9900KF
Aggregate performance score
Core i9-9900KF outperforms Xeon Platinum 8256 by a small 9% based on our aggregate benchmark results.
Primary details
Comparing Core i9-9900KF and Xeon Platinum 8256 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 657 | 713 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 8.96 | 1.80 |
| Market segment | Desktop processor | Server |
| Series | Intel Core i9 | Intel Xeon Platinum |
| Architecture codename | Coffee Lake-R (2018−2019) | Cascade Lake-SP (2018) |
| Release date | 8 January 2019 (5 years ago) | 11 December 2018 (5 years ago) |
| Launch price (MSRP) | $488 | $7,007 |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-9900KF has 398% better value for money than Xeon Platinum 8256.
Detailed specifications
Core i9-9900KF and Xeon Platinum 8256 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 | 8 (Octa-Core) | 4 (Quad-Core) |
| Threads | 16 | 8 |
| Base clock speed | 3.6 GHz | 3.8 GHz |
| Boost clock speed | 5 GHz | 3.9 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | no data |
| Multiplier | no data | 38 |
| L1 cache | 64K (per core) | 64K (per core) |
| L2 cache | 256K (per core) | 1 MB (per core) |
| L3 cache | 16 MB (shared) | 16.5 MB (shared) |
| Chip lithography | 14 nm | 14 nm |
| Maximum core temperature | 100 °C | 72 °C |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | no data | 8,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i9-9900KF and Xeon Platinum 8256 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) | 8 (Multiprocessor) |
| Socket | FCLGA1151 | FCLGA3647 |
| Power consumption (TDP) | 95 Watt | 105 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i9-9900KF and Xeon Platinum 8256. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | 2.0 | 2.0 |
| Hyper-Threading Technology | + | + |
| TSX | + | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Turbo Boost Max 3.0 | no data | - |
| Status | Discontinued | Launched |
| Deep Learning Boost | - | + |
Security technologies
Core i9-9900KF and Xeon Platinum 8256 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | + |
| Secure Key | + | no data |
| MPX | + | - |
| Identity Protection | + | - |
| SGX | Yes with Intel® ME | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i9-9900KF and Xeon Platinum 8256 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i9-9900KF and Xeon Platinum 8256. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2666 | DDR4-2933 |
| Maximum memory size | 128 GB | 1 TB |
| Max memory channels | 2 | 6 |
| Maximum memory bandwidth | 42.671 GB/s | 140.8 GB/s |
| ECC memory support | - | + |
Peripherals
Specifications and connection of peripherals supported by Core i9-9900KF and Xeon Platinum 8256.
| PCIe version | 3.0 | 3.0 |
| PCI Express lanes | 16 | 48 |
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 | 11.84 | 10.89 |
| Physical cores | 8 | 4 |
| Threads | 16 | 8 |
| Power consumption (TDP) | 95 Watt | 105 Watt |
i9-9900KF has a 8.7% higher aggregate performance score, 100% more physical cores and 100% more threads, and 10.5% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between Core i9-9900KF and Xeon Platinum 8256.
Note that Core i9-9900KF is a desktop processor while Xeon Platinum 8256 is a server/workstation one.
Should you still have questions on choice between Core i9-9900KF and Xeon Platinum 8256, ask them in Comments section, and we shall answer.
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