Feex·GPU
AMD · Radeon

AMD Radeon R5 M255X

The AMD Radeon R5 M255X is a graphics card. 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 supports DirectX 11 and OpenGL 4.4.

6/10 key specs recorded · 22 facts

Depth: 11 recorded fields, 2 features

Specification data last verified July 27, 2026 against AMD.com Specifications. Coverage: 6 of 10 tracked specifications recorded.

AMD.com Specifications
Shading units
320cores
5 compute units
Memory
4 GB
DDR3 · 64-bit
Boost clock
940 MHz
Board power
n/a

Performance

Theoretical throughput

FP32 (single precision) 0.602 TFLOPS calculatedcalculated from shaders x boost clock (MHz) x 2 / 1e6 = 320 x 940 x 2 / 1e6

FP32 (single precision) (0.602 TFLOPS) is calculated by Feex from stored specifications, not stated by AMD.

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 M255X has 320 shading units and 5 compute units.

The AMD Radeon R5 M255X 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 M255X.

Clock speeds

Base clock Not recorded
Boost clock 940 MHz
Game clock Not recorded
Memory clock Not recorded
Effective memory clock Not recorded

The AMD Radeon R5 M255X boosts to 940 MHz.

Memory

Size 4 GB
Type DDR3
Bus width 64-bit
Bandwidth 16.0 GB/s

The AMD Radeon R5 M255X is equipped with 4 GB of DDR3 memory, uses a 64-bit memory bus and delivers 16.0 GB/s of memory bandwidth.

Market

Launched Not recorded
Launch price Not recorded
Status Not recorded
Form factor Not recorded
Segment Desktop
Series Radeon

Graphics and compute APIs

The AMD Radeon R5 M255X 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 M255X. Feex has no recorded Vulkan version for the AMD Radeon R5 M255X. Feex has no recorded OpenCL version for the AMD Radeon R5 M255X.

Features

The AMD Radeon R5 M255X 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 M255X supports Resizable BAR and AMD SmartShift. That is silence, not a statement that they are unsupported.

The AMD Radeon R5 M255X supports Radeon Dual Graphics and Switchable graphics under Platform.

Frequently asked questions

How much VRAM does the AMD Radeon R5 M255X have?

The AMD Radeon R5 M255X has 4 GB of DDR3 memory on a 64-bit bus. Its memory bandwidth is 16.0 GB/s.