EPYC 9455 vs Atom x5-E3940
Primary details
Comparing Atom x5-E3940 and EPYC 9455 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2307 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Server |
| Series | 5x Intel Atom | no data |
| Power efficiency | 11.59 | no data |
| Architecture codename | Apollo Lake (2014−2016) | Turin (2024) |
| Release date | 30 August 2014 (10 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $5,412 |
Detailed specifications
Atom x5-E3940 and EPYC 9455 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 | 4 (Quad-Core) | 48 (Octatetraconta-Core) |
| Threads | 4 | 96 |
| Base clock speed | 1.6 GHz | 3.15 GHz |
| Boost clock speed | 1.8 GHz | 4.4 GHz |
| L1 cache | 56K (per core) | 80 KB (per core) |
| L2 cache | 2 MB (shared) | 1 MB (per core) |
| L3 cache | 0 KB | 192 MB (shared) |
| Chip lithography | 14 nm | 4 nm |
| Die size | no data | 6x 70.6 mm2 |
| Maximum case temperature (TCase) | 103 °C | no data |
| Number of transistors | no data | 49,890 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Atom x5-E3940 and EPYC 9455 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 |
| Socket | Intel BGA 1296 | SP5 |
| Power consumption (TDP) | 10 Watt | 300 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom x5-E3940 and EPYC 9455. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Precision Boost 2 | no data | + |
Security technologies
Atom x5-E3940 and EPYC 9455 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom x5-E3940 and EPYC 9455 are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom x5-E3940 and EPYC 9455. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1866 | DDR5 |
| Maximum memory size | 8 GB | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel HD Graphics 500 | N/A |
Peripherals
Specifications and connection of peripherals supported by Atom x5-E3940 and EPYC 9455.
| PCIe version | 2.0 | 5.0 |
| PCI Express lanes | 4 | 128 |
Pros & cons summary
| Recency | 30 August 2014 | 10 October 2024 |
| Physical cores | 4 | 48 |
| Threads | 4 | 96 |
| Chip lithography | 14 nm | 4 nm |
| Power consumption (TDP) | 10 Watt | 300 Watt |
Atom x5-E3940 has 2900% lower power consumption.
EPYC 9455, on the other hand, has an age advantage of 10 years, 1100% more physical cores and 2300% more threads, and a 250% more advanced lithography process.
We couldn't decide between Atom x5-E3940 and EPYC 9455. We've got no test results to judge.
Be aware that Atom x5-E3940 is a notebook processor while EPYC 9455 is a server/workstation one.
Should you still have questions on choice between Atom x5-E3940 and EPYC 9455, ask them in Comments section, and we shall answer.
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