Atom C3958 vs Ultra 7 356H
Aggregate performance score
Core Ultra 7 356H outperforms Atom C3958 by a whopping 707% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 413 | 2059 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 0.17 |
| Market segment | Laptop | Server |
| Series | no data | Intel Atom |
| Power efficiency | 30.52 | 3.05 |
| Designer | Intel | Intel |
| Manufacturer | Intel | no data |
| Architecture codename | Panther Lake (2026) | Goldmont (2016−2017) |
| Release date | 5 January 2026 (less than a year ago) | 15 August 2017 (8 years ago) |
| Launch price (MSRP) | no data | $449 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Core Ultra 7 356H and Atom C3958 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 | 16 (Hexadeca-Core) | 16 (Hexadeca-Core) |
| Performance-cores | 4 | no data |
| Efficient-cores | 8 | no data |
| Low Power Efficient-cores | 4 | no data |
| Threads | 16 | 16 |
| Base clock speed | 1.9 GHz | 2 GHz |
| Boost clock speed | 4.7 GHz | 2 GHz |
| Multiplier | no data | 20 |
| L1 cache | 192 KB (per core) | 896 KB |
| L2 cache | 2.5 MB (per core) | 16 MB |
| L3 cache | 18 MB (shared) | 16 MB |
| Chip lithography | 3 nm | 14 nm |
| Maximum core temperature | no data | 83 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | - |
Compatibility
Information on Core Ultra 7 356H and Atom C3958 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 | 1 (Uniprocessor) |
| Socket | FCBGA2540 | FCBGA1310 |
| Power consumption (TDP) | 25 Watt | 31 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core Ultra 7 356H and Atom C3958. 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 | + |
| Speed Shift | + | no data |
| Turbo Boost Technology | 2.0 | - |
| Hyper-Threading Technology | no data | - |
| Thermal Monitoring | + | - |
| Turbo Boost Max 3.0 | + | no data |
| Deep Learning Boost | + | - |
| Supported AI Software Frameworks | OpenVINO™, WindowsML, DirectML, ONNX RT, WebNN | - |
Security technologies
Core Ultra 7 356H and Atom C3958 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | + |
| Secure Boot | no data | + |
| SGX | no data | - |
| OS Guard | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core Ultra 7 356H and Atom C3958 are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 356H and Atom C3958. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | LPDDR5X-8533, DDR5-7200 | DDR4: 2400 |
| Maximum memory size | 128 GB | 256 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | no data | 38.397 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® Graphics | no data |
| Quick Sync Video | + | - |
| Graphics max frequency | 2.45 GHz | no data |
Graphics interfaces
Available interfaces and connections of Core Ultra 7 356H and Atom C3958 integrated GPUs.
| Number of displays supported | 4 | no data |
Graphics image quality
Maximum display resolutions supported by Core Ultra 7 356H and Atom C3958 integrated GPUs, including resolutions over different interfaces.
| Max resolution over eDP | 3840 x 2400 @ 120Hz | no data |
| Max resolution over DisplayPort | 7680 x 4320 @ 60Hz | no data |
Graphics API support
APIs supported by Core Ultra 7 356H and Atom C3958 integrated GPUs, sometimes API versions are included.
| DirectX | DirectX 12 Ultimate | no data |
| OpenGL | 4.6 | no data |
Peripherals
Specifications and connection of peripherals supported by Core Ultra 7 356H and Atom C3958.
| PCIe version | 5.0 and 4.0 | 3 |
| PCI Express lanes | 20 | 16 |
| USB revision | no data | 3 |
| Total number of SATA ports | no data | 16 |
| Number of USB ports | no data | 8 |
| Integrated LAN | no data | 4x10/2.5/1 GBE |
Synthetic benchmarks
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.
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. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 18.07 | 2.24 |
| Recency | 5 January 2026 | 15 August 2017 |
| Chip lithography | 3 nm | 14 nm |
| Power consumption (TDP) | 25 Watt | 31 Watt |
Ultra 7 356H has a 706.7% higher aggregate performance score, an age advantage of 8 years, a 366.7% more advanced lithography process, and 24% lower power consumption.
The Intel Core Ultra 7 356H is our recommended choice as it beats the Intel Atom C3958 in performance tests.
Be aware that Core Ultra 7 356H is a notebook processor while Atom C3958 is a server/workstation one.
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