Intel Atom серии E645C vs Intel Atom серии E640: comparison
Comparison of Intel Atom серии E645C and Intel Atom серии E640: key differences and a full specification table.
Key differences
Intel Atom серии E645C has a higher maximum memory size (2.93 GB vs 2 GB).
At the same time, Intel Atom серии E640 has a lower TDP (3.6 W vs 7 W).
Both processors match on: core count (1), thread count (2), base clock (1 GHz), process node (45 nm), memory channels (1).
These are specification values: they show differences between the models but do not determine a performance winner. For a specific workload, rely on independent benchmarks.
Key specifications
| Parameter | Intel Atom серии E645C | Intel Atom серии E640 |
|---|---|---|
| Cores / threads | 1 / 2 | 1 / 2 |
| TDP | 7 W | 3.6 W |
| Process | 45 nm | 45 nm |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | Intel Atom серии E645C | Intel Atom серии E640 |
|---|---|---|
| General | ||
| Model | E645C | E640 |
| Codename | Stellarton | Tunnel Creek |
| Segment | Embedded | Embedded |
| Product line | Устаревшие процессоры Intel Atom | Устаревшие процессоры Intel Atom |
| Process | 45 nm | 45 nm |
| Launch date | Q4 2010 | Q3 2010 |
| Status | Discontinued | Discontinued |
| Servicing status | End of Servicing Updates | End of Servicing Updates |
| Embedded options available | No | Yes |
| Use conditions | — | Industrial Commercial Temp |
| CPU | ||
| Cores | 1 | 1 |
| Threads | 2 | 2 |
| Multithreading (SMT/HT) | Yes | Yes |
| Base clock | 1 GHz | 1 GHz |
| L2 cache | 512 KB | 512 KB |
| Bus speed | 2.5 GT/s | 2.5 GHz |
| TDP | 7 W | 3.6 W |
| Turbo Boost | No | No |
| 64-bit support | — | No |
| Instruction set width | 32 bit | 32 bit |
| FSB parity | — | No |
| Memory | ||
| Max memory size | 2.93 GB | 2 GB |
| Memory types | DDR2 | DDR2 |
| Memory channels | 1 | 1 |
| ECC memory supported | No | No |
| Graphics | ||
| Graphics base frequency | 320 MHz | 320 MHz |
| I/O and interfaces | ||
| PCI Express revision | — | 1 |
| PCI Express lanes | 2 | 4 |
| PCI Express configurations | x1, root complex only | x1, root complex only |
| Package and thermal | ||
| Sockets supported | FCBGA1466 | FCBGA676 |
| Package size | 37.5mm x 37.5mm | 22mmx22mm |
| TJUNCTION | — | 90 °C |
| Security and virtualization | ||
| Virtualization (VT-x / AMD-V) | Yes | Yes |
| Virtualization for Directed I/O (VT-d) | — | No |
| Execute Disable Bit | — | Yes |
| Intel Trusted Execution Technology | — | No |
| Technologies | ||
| Enhanced SpeedStep | Yes | Yes |
| Idle States | — | Yes |
| Thermal Monitoring Technologies | — | Yes |