AMD Radeon R5 M255

AMD Radeon R5 M255

The AMD Radeon R5 M255 is an entry-level DirectX 11 graphics card for laptops, which is based on the Sun GPU (GCN architecture). The core is clocked at up to 940 MHz and the DDR3 graphics memory runs at 1000 MHz (64-bit interface).


Compared to the Mars chip (e.g. HD 8570M), Sun offers less hardware units. The GPU integrates 320 shaders, 20 TMUs and 4 ROPs and is therefore located in the low-end segment.


The performance of the Radeon R5 M255 is similar to the HD 8500M series, e.g. the HD 8570M. Due to a slightly higher core clock, the M255 should be somewhat faster than the R5 M230. However, the GPU performs still a bit below a GeForce 820M and hardly beats Intels HD Graphics 4600. Current and demanding games of 2014 will run fluently only in low resolutions and detail settings.

The 320 shaders can be used with OpenCL 1.2 for general-purpose calculations (as 5 compute units). Compared to old TeraScale 2 chips, the GCN-based architecture offers improved performance in this framework.


The R5 series also supports automatic graphics switching between the integrated GPU and discrete GPU. Called Enduro, the technology supersedes AMD's Dynamic Switchable Graphics and is similar to Nvidia's Optimus. Furthermore, the R5 M255 can directly support multiple monitors using Eyefinity technology.

Other features of the R5 series include ZeroCore for reducing power consumption when the display is turned off and Power Gating to power down areas of the chip that are not used. PowerTune allows automatic overclocking and underclocking of the graphics card as long as the GPU is within its TDP limit. For example, the chip may be underclocked when running FurMark and OCCT, but will overclock in certain games.

Power Consumption

The power consumption should be similar to slower models of the HD 8500M or 8600M series. As a result, the R5 M255 is suited for 13-inch notebooks or larger.

Radeon R5 M200 Series
Radeon R5 M255 320 @ 940 MHz64 Bit @ 1800 - 2000 MHz

Radeon R5 M230

320 @ 855 MHz64 Bit @ 1800 - 2000 MHz

Radeon R5 M240

320 @ 650 - 700 (Boost) MHz64 Bit @ 1800 MHz
CodenameTopaz Pro / Sun
Pipelines320 - unified
Core Speed *940 MHz
Memory Speed *1800 - 2000 MHz
Memory Bus Width64 Bit
Memory TypeDDR3
Max. Amount of Memory4096 MB
Shared Memoryno
DirectXDirectX 11.2, Shader 5.0
technology28 nm
FeaturesPCI Express 3.0 x8, App Acceleration, PowerPlay, PowerTune, ZeroCore, Enduro, Eyefinity, Mantle
Date of Announcement01.05.2014
Link to Manufacturer Page
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.


No benchmarks found for this graphics card.

For more games that might be playable and a list of all games and graphics cards visit our Gaming List

Errors [Close]

# Table 'notebookcheck.tx_nbc2_benchcache_gpu' doesn't exist +5.636s ... 5.67s

#0 Table tx_nbc2_benchcache_gpu alreday found +0.034s ... 0.034s

#1 About to fill cache table +0s ... 0.034s

#2 Filled cache +4.169s ... 9.839s

#3 Before gaming benchmark output +0.292s ... 10.132s

#4 return log +0.003s ... 10.134s

No reviews found for this graphics card.

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Class 1
GeForce GTX 590
GeForce GTX 580
Radeon HD 6970
GeForce GTX 570
GeForce GTX 560 Ti
Radeon HD 5850
Radeon HD 7770
Radeon HD 7770
GeForce GTX 460 768MB
Radeon HD 6790
Radeon HD 5770
GeForce GTX 550 Ti
Class 2
GeForce GTS 450
Radeon HD 4850
Class 3
Radeon HD 5670
GeForce GT 240
Radeon R6 M255DX
GeForce GT 430
Radeon HD 5570
GeForce GT 220
Radeon HD 6450 GDDR5
Class 4
Radeon R3 (Mullins/Beema)
Mali-T760 MP6
Class 5
Radeon HD 4350
GeForce G 107M *
Chrome9HD *
PowerVR G6200
Class 6
unknown *

* Approximate position of the graphics adapter

> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Comparison of Laptop Graphics Cards > AMD Radeon R5 M255
Author: Klaus Hinum (Update: 2014-08-12)