Explore AMD Phenom II X2 521 technical reviews, specifications and benchmark results, with practical context for performance, compatibility and upgrade comparisons.
Last updated: 2026-10-20AMD Phenom II X2 521 is a Desktop processor with 2 cores and 2 threads. Its base clock is 3.5 GHz. It records a PassMark CPU Mark of 1349 and a single-thread rating of 1402. Its stated TDP is 65 W.
A summary based on specifications and results.
AMD Phenom II X2 521 is a Desktop processor with 2 cores and 2 threads. Its base clock is 3.5 GHz. It records a PassMark CPU Mark of 1349 and a single-thread rating of 1402. Its stated TDP is 65 W.
Specification context
The AMD Phenom II X2 521 is a Desktop released in 2011. Recorded specifications include 2 cores and 2 threads, a 65 W reference TDP, a 1,349 CPU Mark. Use these figures to understand its position, then compare the results with your software and the complete platform.
The 1,349 CPU Mark is a broad overall-performance measure, while the 1,402 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 AM2+/AM3. 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 2 cores and 2 threads, a 65 W reference TDP, a 1,349 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 AM2+/AM3 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 | 2011 |
| Socket | AM2+/AM3 |
| Cores / threads | 2 / 2 |
| Base clock | 3.50 GHz |
| Max turbo | — |
| TDP | 65 W |
| Integrated graphics | — |
| Memory type | — |
|---|---|
| Official speed | — |
| Maximum capacity | — |
