EPYC 7261 vs Atom C3955
Aggregate performance score
EPYC 7261 outperforms Atom C3955 by an impressive 92% based on our aggregate benchmark results.
Primary details
Comparing Atom C3955 and EPYC 7261 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1489 | 999 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.96 | no data |
| Market segment | Server | Server |
| Series | Intel Atom | AMD EPYC |
| Power efficiency | 10.79 | 3.91 |
| Architecture codename | Goldmont (2016−2017) | Naples (2017−2018) |
| Release date | 15 August 2017 (7 years ago) | 14 June 2018 (6 years ago) |
| Launch price (MSRP) | $434 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Atom C3955 and EPYC 7261 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) | 8 (Octa-Core) |
| Threads | 16 | 16 |
| Base clock speed | 2.1 GHz | 2.5 GHz |
| Boost clock speed | 2.4 GHz | 2.9 GHz |
| Multiplier | 21 | 25 |
| L1 cache | 896 KB | 96K (per core) |
| L2 cache | 16 MB | 512K (per core) |
| L3 cache | 16 MB | 32 MB (shared) |
| Chip lithography | 14 nm | 14 nm |
| Die size | no data | 213 mm2 |
| Maximum core temperature | 78 °C | no data |
| Maximum case temperature (TCase) | no data | 81 °C |
| Number of transistors | no data | 4,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | - | + |
Compatibility
Information on Atom C3955 and EPYC 7261 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) | 2 (Multiprocessor) |
| Socket | FCBGA1310 | SP3 |
| Power consumption (TDP) | 32 Watt | 170 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom C3955 and EPYC 7261. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| QuickAssist | - | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | - | no data |
Security technologies
Atom C3955 and EPYC 7261 technologies aimed at improving security, for example, by protecting against hacks.
| EDB | + | no data |
| Secure Boot | + | no data |
| Secure Key | + | no data |
| SGX | - | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom C3955 and EPYC 7261 are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom C3955 and EPYC 7261. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4: 2400 | DDR4-2666 |
| Maximum memory size | 256 GB | 2 TiB |
| Max memory channels | 2 | 8 |
| Maximum memory bandwidth | 38.397 GB/s | 170.671 GB/s |
| ECC memory support | + | + |
Peripherals
Specifications and connection of peripherals supported by Atom C3955 and EPYC 7261.
| PCIe version | 3 | 3.0 |
| PCI Express lanes | 16 | 128 |
| USB revision | 3 | no data |
| Total number of SATA ports | 16 | no data |
| Max number of SATA 6 Gb/s Ports | 16 | no data |
| Number of USB ports | 8 | no data |
| Integrated LAN | 4x10/2.5/1 GBE | no data |
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 | 3.65 | 7.02 |
| Recency | 15 August 2017 | 14 June 2018 |
| Physical cores | 16 | 8 |
| Power consumption (TDP) | 32 Watt | 170 Watt |
Atom C3955 has 100% more physical cores, and 431.3% lower power consumption.
EPYC 7261, on the other hand, has a 92.3% higher aggregate performance score, and an age advantage of 9 months.
The EPYC 7261 is our recommended choice as it beats the Atom C3955 in performance tests.
Should you still have questions on choice between Atom C3955 and EPYC 7261, ask them in Comments section, and we shall answer.
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