AMD Radeon R5 M255

AMD Radeon R5 M255

The AMD Radeon R5 M255 is an entry-level DirectX 12 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 beats the R5 M230. Overall, the GPU performs a bit better than a GeForce 820M and 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 @ 0.94 GHz64 Bit @ 1800 - 2000 MHz
Radeon R5 M240 compare 320 @ 1.03 GHz64 Bit @ 1800 MHz
Radeon R5 M230 compare 320 @ 0.86 GHz64 Bit @ 1800 - 2000 MHz
CodenameTopaz Pro / Sun
Pipelines320 - unified
Core Speed940 MHz
Memory Speed1800 - 2000 MHz
Memory Bus Width64 Bit
Memory TypeDDR3
Max. Amount of Memory4096 MB
Shared Memoryno
DirectXDirectX 12, 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


Performance Rating - 3DMark 11 + Fire Strike + Time Spy
5 pt (5%)
3DMark - 3DMark Cloud Gate Score
min: 4606     avg: 4880     median: 4859 (6%)     max: 5169 Points
3DMark - 3DMark Fire Strike Standard Score
min: 973     avg: 982     median: 980 (3%)     max: 994 Points
3DMark - 3DMark Fire Strike Standard Graphics
min: 1068     avg: 1078     median: 1080.5 (2%)     max: 1084 Points
3DMark - 3DMark Ice Storm Graphics
min: 34939     avg: 42701     median: 44076.5 (6%)     max: 47713 Points
3DMark 11 - 3DM11 Performance Score
min: 1866     avg: 1952     median: 1907 (4%)     max: 2173 Points
3DMark 11 - 3DM11 Performance GPU
min: 1717     avg: 1831     median: 1784 (3%)     max: 2080 Points
3DMark Vantage
3DM Vant. Perf. total +
3DM Vant. Perf. GPU no PhysX +
3DMark 06 3DMark 06 - Standard 1280x1024 +
SPECviewperf 12
specvp12 sw-03 +
specvp12 snx-02 +
specvp12 showcase-01 +
specvp12 mediacal-01 +
specvp12 maya-04 +
specvp12 energy-01 +
specvp12 creo-01 +
specvp12 catia-04 +
Cinebench R10 Cinebench R10 Shading (32bit) +
Cinebench R11.5 Cinebench R11.5 OpenGL 64 Bit +
Cinebench R15
Cinebench R15 OpenGL 64 Bit +
Cinebench R15 OpenGL Ref. Match 64 Bit +
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

Game Benchmarks

The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailed information on the benchmark results, click on the fps number.

low 1280x720
8.5  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
low 1280x720
18.9  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
World of Tanks enCore

World of Tanks enCore

low 1366x768
150  fps    + Compare
med. 1920x1080
22.5  fps    + Compare
» With all tested laptops playable in detail settings low.
low 1280x720
22.7  fps    + Compare
med. 1920x1080
15.7  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.