Atom C3955 vs Opteron 6378
Aggregate performance score
Opteron 6378 outperforms Atom C3955 by a minimal 2% based on our aggregate benchmark results.
Primary details
Comparing Opteron 6378 and Atom C3955 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1481 | 1489 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.41 | 0.96 |
| Market segment | Server | Server |
| Series | no data | Intel Atom |
| Power efficiency | 3.05 | 10.79 |
| Architecture codename | Abu Dhabi (2012) | Goldmont (2016−2017) |
| Release date | 5 November 2012 (12 years ago) | 15 August 2017 (7 years ago) |
| Launch price (MSRP) | $396 | $434 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Opteron 6378 has 47% better value for money than Atom C3955.
Detailed specifications
Opteron 6378 and Atom C3955 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) |
| Threads | 16 | 16 |
| Base clock speed | 2.4 GHz | 2.1 GHz |
| Boost clock speed | 3.3 GHz | 2.4 GHz |
| Multiplier | no data | 21 |
| L1 cache | 768 KB | 896 KB |
| L2 cache | 16 MB | 16 MB |
| L3 cache | 8 MB (per die) | 16 MB |
| Chip lithography | 32 nm | 14 nm |
| Die size | 315 mm2 | no data |
| Maximum core temperature | no data | 78 °C |
| Number of transistors | 2,400 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Opteron 6378 and Atom C3955 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 | 4 | 1 (Uniprocessor) |
| Socket | G34 | FCBGA1310 |
| Power consumption (TDP) | 115 Watt | 32 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Opteron 6378 and Atom C3955. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | - |
| Enhanced SpeedStep (EIST) | no data | + |
| QuickAssist | no data | - |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | - |
Security technologies
Opteron 6378 and Atom C3955 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 Opteron 6378 and Atom C3955 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 Opteron 6378 and Atom C3955. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4: 2400 |
| Maximum memory size | no data | 256 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 38.397 GB/s |
| ECC memory support | - | + |
Peripherals
Specifications and connection of peripherals supported by Opteron 6378 and Atom C3955.
| PCIe version | 2.0 | 3 |
| PCI Express lanes | no data | 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 | 3.71 | 3.65 |
| Recency | 5 November 2012 | 15 August 2017 |
| Chip lithography | 32 nm | 14 nm |
| Power consumption (TDP) | 115 Watt | 32 Watt |
Opteron 6378 has a 1.6% higher aggregate performance score.
Atom C3955, on the other hand, has an age advantage of 4 years, a 128.6% more advanced lithography process, and 259.4% lower power consumption.
Given the minimal performance differences, no clear winner can be declared between Opteron 6378 and Atom C3955.
Should you still have questions on choice between Opteron 6378 and Atom C3955, ask them in Comments section, and we shall answer.
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