Ryzen 5 8640U vs Atom E645C
Primary details
Comparing Atom E645C and Ryzen 5 8640U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 563 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Power efficiency | no data | 44.62 |
| Architecture codename | Stellarton (2010) | Hawk Point-U (Zen 4) (2023) |
| Release date | 22 November 2010 (13 years ago) | 6 December 2023 (less than a year ago) |
Detailed specifications
Atom E645C and Ryzen 5 8640U 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 | 1 (Single-Core) | 6 (Hexa-Core) |
| Threads | 2 | 12 |
| Base clock speed | no data | 3.5 GHz |
| Boost clock speed | 1 GHz | 4.9 GHz |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 512 KB (per core) | 1 MB (per core) |
| L3 cache | 0 KB | 16 MB (shared) |
| Chip lithography | 45 nm | 4 nm |
| Die size | 26 mm2 | 178 mm2 |
| Maximum core temperature | no data | 100 °C |
| Number of transistors | 47 million | 25,000 million |
| 64 bit support | - | + |
| Windows 11 compatibility | - | no data |
Compatibility
Information on Atom E645C and Ryzen 5 8640U 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 |
| Socket | Intel BGA1466 | FP8 |
| Power consumption (TDP) | 4 Watt | 28 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Atom E645C and Ryzen 5 8640U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3 |
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | no data |
| Hyper-Threading Technology | + | no data |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Atom E645C and Ryzen 5 8640U are enumerated here.
| AMD-V | - | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Atom E645C and Ryzen 5 8640U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR2 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel GMA 600 | AMD Radeon 760M |
Peripherals
Specifications and connection of peripherals supported by Atom E645C and Ryzen 5 8640U.
| PCIe version | no data | 4.0 |
| PCI Express lanes | no data | 20 |
Pros & cons summary
| Recency | 22 November 2010 | 6 December 2023 |
| Physical cores | 1 | 6 |
| Threads | 2 | 12 |
| Chip lithography | 45 nm | 4 nm |
| Power consumption (TDP) | 4 Watt | 28 Watt |
Atom E645C has 600% lower power consumption.
Ryzen 5 8640U, on the other hand, has an age advantage of 13 years, 500% more physical cores and 500% more threads, and a 1025% more advanced lithography process.
We couldn't decide between Atom E645C and Ryzen 5 8640U. We've got no test results to judge.
Should you still have questions on choice between Atom E645C and Ryzen 5 8640U, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
