Explore AMD Athlon II X4 638 Quad-Core technical reviews, specifications and benchmark results, with practical context for performance, compatibility and upgrade comparisons.
Last updated: 2026-10-20AMD Athlon II X4 638 Quad-Core is a Desktop processor with 4 cores and 4 threads. Its base clock is 2.7 GHz. It records a PassMark CPU Mark of 2260 and a single-thread rating of 1158. Its stated TDP is 65 W.
A summary based on specifications and results.
AMD Athlon II X4 638 Quad-Core is a Desktop processor with 4 cores and 4 threads. Its base clock is 2.7 GHz. It records a PassMark CPU Mark of 2260 and a single-thread rating of 1158. Its stated TDP is 65 W.
Specification context
The AMD Athlon II X4 638 Quad-Core is a Desktop released in 2015. Recorded specifications include 4 cores and 4 threads, a 65 W reference TDP, a 2,260 CPU Mark. Use these figures to understand its position, then compare the results with your software and the complete platform.
The 2,260 CPU Mark is a broad overall-performance measure, while the 1,158 single-thread result adds context for less-parallel work. Compare the nearby alternatives on this page and do not treat one score as a verdict for every application.
It uses socket FM1. A matching socket is only the first check; confirm the official motherboard CPU-support list, BIOS revision and board power limits.
The 65 W TDP helps size the cooling class, but it is not the same as peak wall-power consumption.
FAQ
The main recorded details are 4 cores and 4 threads, a 65 W reference TDP, a 2,260 CPU Mark. The tables on this page show socket, memory, cache and graphics data when available.
The product name or CPU Mark alone cannot answer that. Check single-thread performance, core count, the target graphics card, gaming resolution and results from the games you play.
Start with FM1 motherboards, then confirm the official CPU-support list and required BIOS revision for the exact board before buying.
The recorded reference TDP is 65 W. Real consumption can be lower or higher depending on power limits, motherboard, workload and cooling.
This guidance interprets recorded specifications and results; it does not claim hands-on device testing. Results can vary with motherboard, power, memory and cooling.
Multi-axis comparison
A direct comparison with nearby processors from the same brand and a similar core count.
A higher CPU Mark indicates stronger overall performance.
Measures speed in tasks that depend on one CPU thread.
Estimated as CPU Mark divided by TDP.
Bars are relative to the processors shown here, not a global ranking of every CPU.
Snapshot from 2026-10-20
| Brand | AMD |
|---|---|
| Category | Desktop |
| Release year | 2015 |
| Socket | FM1 |
| Cores / threads | 4 / 4 |
| Base clock | 2.70 GHz |
| Max turbo | — |
| TDP | 65 W |
| Integrated graphics | — |
| Memory type | — |
|---|---|
| Official speed | — |
| Maximum capacity | — |
