AMD · Radeon

AMD Radeon R5 M255

The AMD Radeon R5 M255 is a graphics card released on October 1, 2014, built on the GCN architecture using a 28 nm process. It has 320 shading units, 4 GB of DDR3 memory on a 64-bit bus, 16.0 GB/s of memory bandwidth and a boost clock of 940 MHz. It scores 541 in the PassMark G3D benchmark. It supports DirectX 11 and OpenGL 4.4.

GCNTopaz Pro28 nm

9/10 key specs recorded · 42 facts

Depth: 35 recorded fields, 2 features, 5 PassMark workloads

Specification data last verified October 1, 2026 against PassMark Videocard Benchmark, AMD.com Specifications and Wikipedia GPU list tables (wikigrid-2026-09). Coverage: 9 of 10 tracked specifications recorded.

PassMark Videocard Benchmark AMD.com Specifications Wikipedia GPU list tables (wikigrid-2026-09)PassMark Videocard Benchmark

Shading units

320cores

5 compute units

Memory

4 GB

DDR3 · 64-bit

Boost clock

940 MHz

925 MHz base

Board power

n/a

Performance

The AMD Radeon R5 M255 scores 541 in the PassMark G3D benchmark, higher than 38.3% of the 2,658 GPUs benchmarked (PassMark rank #1,830), measured across 173 submitted results. Its PassMark G2D score is 132.

PassMark G3D Mark

541

Rank #1,830
Faster than 38.3% of 2,658 GPUs
173 samples

0relative to the fastest GPU on record (41,928)

PassMark workload tests

DirectX 9 9 fps

reference: fastest recorded 526 fps · faster than 17% of 1,675 GPUs

DirectX 10 2 fps

reference: fastest recorded 231 fps · faster than 11.9% of 1,602 GPUs

DirectX 11 4 fps

reference: fastest recorded 362 fps · faster than 7.8% of 1,430 GPUs

DirectX 12 5 fps

reference: fastest recorded 213 fps · faster than 13.4% of 1,274 GPUs

GPU Compute 346 ops/s

reference: fastest recorded 26,591 ops/s · faster than 17.5% of 1,447 GPUs

Averages of PassMark PerformanceTest submissions; frames/sec are PassMark test-scene rates, not game FPS. Tests PassMark does not report for this card are omitted. PassMark listing

In the PassMark workload tests the AMD Radeon R5 M255 averages DirectX 9 9 fps, DirectX 10 2 fps, DirectX 11 4 fps, DirectX 12 5 fps and GPU Compute 346 ops/s, across 173 submitted results. Frames per second are PassMark test-scene rates, not game frame rates.

As stated by PassMark

Category Mobile

Bus interface PCIe 3.0 x8

Max memory 4 GB

Core clock Unknown MHz

Memory clock 1000 MHz

DirectX 11.2

OpenGL 4.3

First benchmarked 2014-12-01

Samples 173

PassMark listing (collected 2026-10-01)

PassMark's own listing for the AMD Radeon R5 M255 states the PCIe 3.0 x8 interface, up to 4 GB of memory, a core clock of Unknown MHz, DirectX 11.2 and OpenGL 4.3, first benchmarked on 2014-12-01. These are PassMark's figures, shown separately from the specification tables above.

Not to be confused with

This page covers the AMD Radeon R5 M255 specifically. It is a different product from AMD Radeon R5 M255X, which have their own specifications. Check the exact model name before comparing figures.

Graphics processor

Architecture GCN

Codename Topaz Pro

Chip Not recorded

Process node 28 nm

Transistors Not recorded

Die size Not recorded

The AMD Radeon R5 M255 is based on the GCN architecture, uses the Topaz Pro graphics processor and is manufactured on a 28 nm process.

Shader configuration

Shading units 320

Compute units 5

Streaming multiprocessors Not recorded

Execution units Not recorded

Texture units (TMUs) Not recorded

Render output units (ROPs) Not recorded

Ray tracing cores Not recorded

Tensor / AI cores Not recorded

XMX engines Not recorded

Infinity cache Not recorded

The AMD Radeon R5 M255 has 320 shading units and 5 compute units.

The AMD Radeon R5 M255 does not use XMX engines; those are specific to Intel Arc graphics. Feex has no recorded ray tracing core count for the AMD Radeon R5 M255.

Clock speeds

Base clock 925 MHz

Boost clock 940 MHz

Game clock Not recorded

Memory clock Not recorded

Effective memory clock Not recorded

The AMD Radeon R5 M255 runs at a base clock of 925 MHz and boosts to 940 MHz.

Memory

Size 4 GB

Type DDR3

Bus width 64-bit

Bandwidth 16.0 GB/s

The AMD Radeon R5 M255 is equipped with 4 GB of DDR3 memory, uses a 64-bit memory bus and delivers 16.0 GB/s of memory bandwidth.

Board and power

The AMD Radeon R5 M255 it connects over PCIe 3.0 x8.

Board power (TDP) Not recorded

Total board power Not recorded

Suggested PSU Not recorded

Power connectors Not recorded

Slot width Not recorded

Length Not recorded

Width Not recorded

Height Not recorded

Cooler Not recorded

Max temperature Not recorded

Bus interface PCIe 3.0 x8

Market

Launched October 1, 2014

Launch price Not recorded

Status Not recorded

Form factor Not recorded

Segment Desktop

Series Radeon

The AMD Radeon R5 M255 was released on October 1, 2014.

Benchmarks

PassMark G3D 541

PassMark G2D 132

Rank #1,830

Samples 173

Graphics and compute APIs

The AMD Radeon R5 M255 supports DirectX 11 and OpenGL 4.4.

DirectX 11

OpenGL 4.4

CUDA is an NVIDIA technology and does not apply to the AMD Radeon R5 M255. Feex has no recorded Vulkan version for the AMD Radeon R5 M255. Feex has no recorded OpenCL version for the AMD Radeon R5 M255.

Features

The AMD Radeon R5 M255 has 2 supported features recorded outside the media engine. A feature that no source mentions is shown as not listed, never as unsupported.

Platform

Supported: Radeon Dual Graphics

Support for pairing an AMD APU's integrated graphics with a compatible Radeon GPU.
Supported: Switchable graphics

Support for switching between integrated and dedicated graphics to balance power use and performance.

Not listed (2)

No source Feex holds states whether the AMD Radeon R5 M255 supports Resizable BAR and AMD SmartShift. That is silence, not a statement that they are unsupported.

The AMD Radeon R5 M255 supports Radeon Dual Graphics and Switchable graphics under Platform.

Frequently asked questions

How much VRAM does the AMD Radeon R5 M255 have?

The AMD Radeon R5 M255 has 4 GB of DDR3 memory on a 64-bit bus. Its memory bandwidth is 16.0 GB/s.

How fast is the AMD Radeon R5 M255?

The AMD Radeon R5 M255 scores 541 in the PassMark G3D benchmark, higher than 38.3% of the 2,658 GPUs benchmarked. Its PassMark rank is #1,830. In the PassMark DirectX 12 test it averages 5 fps.

What bus interface does the AMD Radeon R5 M255 use?

The AMD Radeon R5 M255 connects over PCIe 3.0 x8.

When was the AMD Radeon R5 M255 released?

The AMD Radeon R5 M255 was released on October 1, 2014.

Corrections to this record

After an audit, 1 empty field was filled from sources. Each change is listed with its old value, new value, rule and sources.

1 filled value

Architecture: GCN (was Not recorded). Rule: Architecture from chip codename. chip Topaz -> GCN 3. Sources: Wikipedia: List of AMD graphics processing units (revision 1376670003).

The audit log is public: all changes for this GPU, the corrections overview and the method.