638 vs 620e: comparison
Comparison of 638 and 620e: key differences and a full specification table.
Key differences
620e has a lower TDP (45 W vs 65 W).
Both processors match on: core count (4), thread count (4), base clock (2.7 GHz).
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 | 638 | 620e |
|---|---|---|
| Cores / threads | 4 / 4 | 4 / 4 |
| TDP | 65 W | 45 W |
| Process | 32 nm | — |
Full specification table
Differing values are highlighted. This is not a better/worse rating: numbers from different architectures are not always comparable.
| Parameter | 638 | 620e |
|---|---|---|
| General | ||
| Codename | Athlon Legacy | Athlon Legacy |
| Segment | Boxed Processor | Boxed Processor |
| Product line | AMD Athlon II X4 | AMD Athlon II X4 |
| Product family | AMD Athlon Processors | AMD Athlon Processors |
| Process | 32 nm | — |
| Unlocked for overclocking | No | No |
| CPU | ||
| Cores | 4 | 4 |
| Threads | 4 | 4 |
| Base clock | 2.7 GHz | 2.7 GHz |
| L1 cache | 512 KB | — |
| L2 cache | 4 MB | — |
| TDP | 65 W | 45 W |
| Memory | ||
| Memory types | — | DDR3 |
| Graphics | ||
| Has integrated graphics | No | No |
| Package and thermal | ||
| Sockets supported | FM1 uPGA | AM3 |
| TJUNCTION | 70.1 °C | — |
| Identifiers | ||
| Product ID (OEM) | AD638XOJZ43GX | AD620EHDK42GM |
| Product ID (Box) | AD638XOJGXBOX | AD620EHDGMBOX |