AMDOutdated for demanding workloadsDesktop

AMD Athlon II X2 255

Explore AMD Athlon II X2 255 technical reviews, specifications and benchmark results, with practical context for performance, compatibility and upgrade comparisons.

Last updated: 2026-10-20
2.9/ 10
Technical rating

Outdated for demanding workloads

AMD Athlon II X2 255 is a Desktop processor with 2 cores and 2 threads. Its base clock is 3.1 GHz. It records a PassMark CPU Mark of 1210 and a single-thread rating of 1235. Its stated TDP is 65 W.

CPU Mark1,210
429 samples
Single Thread1,235
Overall rank#4,481
of 6,054
Reference price$12.55

Technical assessment

A summary based on specifications and results.

Outdated for demanding workloads
2.9Outdated for demanding workloads

AMD Athlon II X2 255 is a Desktop processor with 2 cores and 2 threads. Its base clock is 3.1 GHz. It records a PassMark CPU Mark of 1210 and a single-thread rating of 1235. Its stated TDP is 65 W.

Specification context

What do these specifications mean in practice?

The AMD Athlon II X2 255 is a Desktop released in 2010. Recorded specifications include 2 cores and 2 threads, a 65 W reference TDP, a 1,210 CPU Mark. Use these figures to understand its position, then compare the results with your software and the complete platform.

Reading guide

Read the performance results

The 1,210 CPU Mark is a broad overall-performance measure, while the 1,235 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.

Platform and compatibility

It uses socket AM3. A matching socket is only the first check; confirm the official motherboard CPU-support list, BIOS revision and board power limits.

Memory and power

The 65 W TDP helps size the cooling class, but it is not the same as peak wall-power consumption.

FAQ

Common processor questions

What are the key AMD Athlon II X2 255 specifications?

The main recorded details are 2 cores and 2 threads, a 65 W reference TDP, a 1,210 CPU Mark. The tables on this page show socket, memory, cache and graphics data when available.

Is the AMD Athlon II X2 255 good for gaming?

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.

Which motherboards support the AMD Athlon II X2 255?

Start with AM3 motherboards, then confirm the official CPU-support list and required BIOS revision for the exact board before buying.

How much power does the AMD Athlon II X2 255 use?

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

How does this processor compare?

A direct comparison with nearby processors from the same brand and a similar core count.

5 CPU

Overall and multi-core performance

A higher CPU Mark indicates stronger overall performance.

01AMD Athlon II X2 255This CPU1,210 points
02AMD Phenom II X2 550AMD1,210 points

Single-thread performance

Measures speed in tasks that depend on one CPU thread.

02AMD Athlon II X2 255This CPU1,235 points
03AMD Phenom II X2 550AMD1,215 points

Performance per watt

Estimated as CPU Mark divided by TDP.

02AMD Athlon II X2 255This CPU18.6 Mark/W
05AMD Phenom II X2 550AMD15.1 Mark/W

Bars are relative to the processors shown here, not a global ranking of every CPU.

Detailed benchmark results

Snapshot from 2026-10-20

Data CompressionKBytes/Sec
26,354.00
Data EncryptionMBytes/Sec
322.60
Extended InstructionsMillion Matrices/Sec
623.00
Find Prime NumbersMillion Primes/Sec
6.00
Floating Point MathMOps/Sec
2,547.00
Integer MathMOps/Sec
3,518.00
PhysicsFrames/Sec
106.00
Random String SortingThousand Strings/Sec
3,281.00

Core specifications

BrandAMD
CategoryDesktop
Release year2010
SocketAM3
Cores / threads2 / 2
Base clock3.10 GHz
Max turbo—
TDP65 W
Integrated graphics—

Memory support

—
Memory type—
Official speed—
Maximum capacity—

Cache hierarchy

L1I2 x 64 KB
L1D2 x 64 KB
L22 x 1024 KB