Atom C3858 vs i9-9900KF
Aggregate performance score
Core i9-9900KF outperforms Atom C3858 by a whopping 289% based on our aggregate benchmark results.
Primary details
Comparing Core i9-9900KF and Atom C3858 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 675 | 1642 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 8.41 | 0.96 |
| Market segment | Desktop processor | Server |
| Series | Intel Core i9 | Intel Atom |
| Power efficiency | 11.46 | 11.21 |
| Architecture codename | Coffee Lake-R (2018−2019) | Goldmont (2016−2017) |
| Release date | 8 January 2019 (5 years ago) | 15 August 2017 (7 years ago) |
| Launch price (MSRP) | $488 | $332 |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-9900KF has 776% better value for money than Atom C3858.
Detailed specifications
Core i9-9900KF and Atom C3858 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) | 12 (Dodeca-Core) |
| Threads | 16 | 12 |
| Base clock speed | 3.6 GHz | 2 GHz |
| Boost clock speed | 5 GHz | 2 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | no data |
| Multiplier | no data | 20 |
| L1 cache | 64K (per core) | 672 KB |
| L2 cache | 256K (per core) | 12 MB |
| L3 cache | 16 MB (shared) | 12 MB |
| Chip lithography | 14 nm | 14 nm |
| Maximum core temperature | 100 °C | 83 °C |
| Maximum case temperature (TCase) | 72 °C | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i9-9900KF and Atom C3858 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 (Uniprocessor) |
| Socket | FCLGA1151 | FCBGA1310 |
| Power consumption (TDP) | 95 Watt | 25 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i9-9900KF and Atom C3858. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | no data |
| AES-NI | + | + |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| QuickAssist | no data | + |
| Turbo Boost Technology | 2.0 | - |
| Hyper-Threading Technology | + | - |
| TSX | + | - |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
Security technologies
Core i9-9900KF and Atom C3858 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | + |
| Secure Boot | no data | + |
| Secure Key | + | + |
| MPX | + | - |
| Identity Protection | + | - |
| SGX | Yes with Intel® ME | - |
| OS Guard | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i9-9900KF and Atom C3858 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i9-9900KF and Atom C3858. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2666 | DDR4: 2400 |
| Maximum memory size | 128 GB | 256 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 42.671 GB/s | 38.397 GB/s |
| ECC memory support | - | + |
Peripherals
Specifications and connection of peripherals supported by Core i9-9900KF and Atom C3858.
| PCIe version | 3.0 | 3 |
| PCI Express lanes | 16 | 16 |
| USB revision | no data | 3 |
| Total number of SATA ports | no data | 16 |
| Max number of SATA 6 Gb/s Ports | no data | 16 |
| Number of USB ports | no data | 8 |
| Integrated LAN | no data | 4x10/2.5/1 GBE |
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 | 11.50 | 2.96 |
| Recency | 8 January 2019 | 15 August 2017 |
| Physical cores | 8 | 12 |
| Threads | 16 | 12 |
| Power consumption (TDP) | 95 Watt | 25 Watt |
i9-9900KF has a 288.5% higher aggregate performance score, an age advantage of 1 year, and 33.3% more threads.
Atom C3858, on the other hand, has 50% more physical cores, and 280% lower power consumption.
The Core i9-9900KF is our recommended choice as it beats the Atom C3858 in performance tests.
Note that Core i9-9900KF is a desktop processor while Atom C3858 is a server/workstation one.
Should you still have questions on choice between Core i9-9900KF and Atom C3858, ask them in Comments section, and we shall answer.
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