AMD Radeon R6 M255DX

AMD Radeon R6 M255DX

The AMD Radeon R7 M255DX is a Hybrid Crossfire combination of the integrated Kaveri Radeon R5 (in the A10-7300 or A8-7100 APU e.g.) and a dedicated Radeon R57 M230, M230X, or M255 (called Dual Graphics - DX). Both graphics cards use the AFR mode (alternate frame rendering) to each render a frame. Around 30 fps this Dual Graphics combination may suffer from micro stuttering due to different frame latencies.

The performance depends on the driver support for the used game. In some cases the game engine will only use the dedicated graphics card and therefore the M255DX may not be faster than e.g. a M230 alone. The other end of the spectrum some games like Tomb Raider achieve significant higher fps rates. However, there are some games where Dual Graphics is even slower than with disabled settings, so the user might need to test the settings out. 

The shaders of both GPUs can be used for OpenCL calculations and therefore make use of both GPUs.

Furthermore, the M255DX supports Mantle, Eyefinity and Enduro to in battery mode (use of the integrated GPU alone).

The maximum power consumption can be quite high using Dual-Graphics as both GPUs of the APU and the dedicated graphics card are running.

CodenameJet UL(T) DDR3
Pipelines576 - unified
Core Speed855 / 514 MHz
Memory TypeDDR3
Shared Memoryyes
DirectXDirectX 12, Shader 5.0
technology28 nm
FeaturesApp Acceleration, PowerPlay, PowerTune, ZeroCore, Enduro, Eyefinity, Mantle
Notebook Sizemedium sized
Date of Announcement04.06.2014
Link to Manufacturer Page


3DMark - Cloud Gate Standard Score 1280x720
min: 2663     avg: 3515.5     median: 3515 (6%)     max: 4368 Points
3DMark - Cloud Gate Standard Graphics 1280x720
min: 4681     avg: 7172     median: 7172 (4%)     max: 9663 Points
3DMark - Fire Strike Score 1920x1080
min: 518     avg: 885     median: 885 (3%)     max: 1252 Points
3DMark - Fire Strike Graphics 1920x1080
min: 670     avg: 1114.5     median: 1114 (3%)     max: 1559 Points
3DMark - Ice Storm Standard Graphics 1280x720
min: 46017     avg: 50324     median: 50324 (7%)     max: 54631 Points
3DMark 11 - Performance 1280x720
min: 1857     avg: 1979     median: 1979 (6%)     max: 2101 points
3DMark 11 - Performance GPU 1280x720
min: 2080     avg: 2198     median: 2198 (4%)     max: 2316 points
3DMark Vantage
P Result 1280x1024 +
P GPU no PhysX 1280x1024 +
Cinebench R10 Shading 32Bit +
Cinebench R11.5 OpenGL 64Bit +
Cinebench R15
OpenGL 64Bit +
Ref. Match 64Bit +
GFXBench (DX / GLBenchmark) 2.7
T-Rex HD Offscreen C24Z16 1920x1080 +
T-Rex HD Onscreen C24Z16 +
GFXBench 3.0 - Manhattan Offscreen OGL off screen
min: 19     avg: 21.6     median: 21 (4%)     max: 23 fps
GFXBench 3.0 - Manhattan Onscreen OGL on screen
min: 30     avg: 35.3     median: 35 (10%)     max: 40 fps
LuxMark v2.0 64Bit - Room GPUs-only
min: 231     avg: 275.5     median: 275 (5%)     max: 320 Samples/s
LuxMark v2.0 64Bit - Sala GPUs-only
min: 431     avg: 501.5     median: 501 (5%)     max: 572 Samples/s
ComputeMark v2.1 - Normal, Score 1024x600
min: 830     avg: 882     median: 882 (3%)     max: 934 Points
- 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 1024x768
20  fps    + Compare
med. 1366x768
13.9  fps    + Compare
high 1920x1080
5.5  fps    + Compare
ultra 1920x1080
3.7  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
low 1024x768
20.7  fps    + Compare
med. 1366x768
17.9  fps    + Compare
high 1920x1080
9.8  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
low 1024x768
34.4  fps    + Compare
med. 1366x768
12.3  fps    + Compare
high 1920x1080
7.4  fps    + Compare
ultra 1920x1080
6.5  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
F1 2014

F1 2014

low 1024x768
37  fps    + Compare
med. 1366x768
29  fps    + Compare
high 1920x1080
22  fps    + Compare
ultra 1920x1080
15  fps    + Compare
» With all tested laptops playable in detail settings low.
low 1024x768
14.1  fps    + Compare
med. 1366x768
8.3  fps    + Compare
high 1920x1080
4.2  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
low 1024x768
30.7  fps    + Compare
med. 1366x768
20.3  fps    + Compare
high 1920x1080
11.6  fps    + Compare
ultra 1920x1080
8.9  fps    + Compare
» The benchmarks indicate that the game is not playable in the tested settings.
low 1280x720
32.5  fps    + Compare
med. 1344x756
22.2  fps    + Compare
high 1920x1080
13.9  fps    + Compare