Ultra 7 255U vs Atom C3955
Primary details
Comparing Atom C3955 and Core Ultra 7 255U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1527 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.85 | no data |
| Market segment | Server | Laptop |
| Series | Intel Atom | no data |
| Power efficiency | 10.78 | no data |
| Architecture codename | Goldmont (2016−2017) | no data |
| Release date | 15 August 2017 (7 years ago) | 1 January 2025 (less than a year ago) |
| Launch price (MSRP) | $434 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Atom C3955 and Core Ultra 7 255U 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) | 12 (Dodeca-Core) |
| Performance-cores | no data | 2 |
| Efficient-cores | no data | 8 |
| Low Power Efficient-cores | no data | 2 |
| Threads | 16 | 14 |
| Base clock speed | 2.1 GHz | no data |
| Boost clock speed | 2.4 GHz | 5.2 GHz |
| Multiplier | 21 | no data |
| L1 cache | 896 KB | no data |
| L2 cache | 16 MB | no data |
| L3 cache | 16 MB | 12 MB |
| Chip lithography | 14 nm | Intel 3 nm |
| Maximum core temperature | 78 °C | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Atom C3955 and Core Ultra 7 255U 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 | FCBGA1310 | FCBGA2049 |
| Power consumption (TDP) | 32 Watt | 57 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom C3955 and Core Ultra 7 255U. 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 | + | + |
| Enhanced SpeedStep (EIST) | + | no data |
| QuickAssist | - | no data |
| Speed Shift | no data | + |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | - | + |
| Thermal Monitoring | - | + |
| Turbo Boost Max 3.0 | no data | - |
| Deep Learning Boost | - | + |
| Supported AI Software Frameworks | - | OpenVINO™, WindowsML, ONNX RT |
Security technologies
Atom C3955 and Core Ultra 7 255U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | + | + |
| Secure Boot | + | no data |
| Secure Key | + | + |
| SGX | - | no data |
| OS Guard | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom C3955 and Core Ultra 7 255U are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom C3955 and Core Ultra 7 255U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4: 2400 | DDR5-6400 |
| Maximum memory size | 256 GB | 128 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 38.397 GB/s | no data |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® Graphics |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 2.1 GHz |
Graphics interfaces
Available interfaces and connections of Atom C3955 and Core Ultra 7 255U integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Atom C3955 and Core Ultra 7 255U integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL) |
| Max resolution over eDP | no data | 3840x2400 @ 120Hz |
| Max resolution over DisplayPort | no data | 7680 x 4320 @ 60Hz |
Graphics API support
APIs supported by Atom C3955 and Core Ultra 7 255U integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12.2 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Atom C3955 and Core Ultra 7 255U.
| PCIe version | 3 | no data |
| PCI Express lanes | 16 | 20 |
| PCI support | no data | 4.0 |
| USB revision | 3 | no data |
| Total number of SATA ports | 16 | no data |
| Number of USB ports | 8 | no data |
| Integrated LAN | 4x10/2.5/1 GBE | no data |
Pros & cons summary
| Recency | 15 August 2017 | 1 January 2025 |
| Physical cores | 16 | 12 |
| Threads | 16 | 14 |
| Power consumption (TDP) | 32 Watt | 57 Watt |
Atom C3955 has 33.3% more physical cores and 14.3% more threads, and 78.1% lower power consumption.
Ultra 7 255U, on the other hand, has an age advantage of 7 years.
We couldn't decide between Atom C3955 and Core Ultra 7 255U. We've got no test results to judge.
Be aware that Atom C3955 is a server/workstation processor while Core Ultra 7 255U is a notebook one.
Should you still have questions on choice between Atom C3955 and Core Ultra 7 255U, ask them in Comments section, and we shall answer.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
