AMD Radeon R9 M485X vs AMD Radeon R9 M470X

AMD Radeon R9 M485X

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The AMD Radeon R9 M485X is a mobile graphics card based on the familiar Tonga chip. The R9 M485X uses all 2048 shaders (32 Compute Units CU) and is based on the third generation of the GCN architecture (Graphics Core Next). Similar to the predecessor cards R9 M395X and M295X, the power consumption should be between 100 and 125 Watts. Compared to the technologically identical Radeon R9 M395X (909 MHz Boost; optional upgrade for the 2015 iMac), the Radeon R9 M485X could have a slightly higher clock. It is the only model from the series (M485X, M470X and M470) with up to 8 GB GDDR5 RAM and a 256-bit memory interface. 

Contrary to the R9 M300 series, the number of products within the R9 M400 series is currently limited to three (M485X, M470X and M470), but this will probably change with the launch of the new Polaris architecture in Q2 2016.

Our gaming benchmarks with the iMac show the predecessor GPU M395X roughly on par with a GeForce GTX 880M or GTX 970M (see below), respectively. Still, the performance is definitely not sufficient for demanding titles in 5K, and this will most likely not change with the M485X.

Sources: AMD (specs), AnandTech (Tonga chip)

AMD Radeon R9 M470X

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The AMD Radeon R9 M470X is an upper mainstream mobile graphics card based on the familiar Bonaire chip. This 28 nm GPU uses all 896 shaders (14 Compute Units CU) and is based on the second generation of the GCN architecture (Graphics Core Next). The maximum memory size is 4 GB (GDDR5, 6000 MHz effective) and it is attached via 128-bit interface. Compared to the technologically identical predecessor card Radeon R9 M385X (1100 MHz), the R9 M470X could have a slightly higher clock.

Contrary to the R9 M300 series, the number of products within the R9 M400 series is currently limited to three (M485X, M470X and M470), but this will probably change with the launch of the new Polaris architecture in Q2 2016.

Sources: AMD (specs), AnandTech (Bonaire chip)

AMD Radeon R9 M485XAMD Radeon R9 M470X
ManufacturerAMDAMD
Radeon R9 M400 Series
Radeon R9 M485X 2048 256 Bit @ 5000 MHz
Radeon R9 M470X 896 @ 1100 MHz128 Bit @ 6000 MHz
Radeon R9 M470 (compare) 768 @ 1000 MHz128 Bit @ 6000 MHz
Radeon R9 M485X 2048 256 Bit @ 5000 MHz
Radeon R9 M470X 896 @ 1100 MHz128 Bit @ 6000 MHz
Radeon R9 M470 (compare) 768 @ 1000 MHz128 Bit @ 6000 MHz
ArchitectureGCN 3GCN 2
2048 - 896 -
Memory5000 MHz6000 MHz
Bus256 Bit128 Bit
MemoryGDDR5GDDR5
Max. Memory8 GB MB4096 MB
nono
DirectXDirectX 12 (FL 12_0), 5.0DirectX 12 FL11_1, 5.0
Transistors5000 Million1500 Million
Technology28 nm28 nm
FeaturesDirectX 12, Vulkan, Mantle, OpenGL 4.4, Enduro, APPDirectCompute 5.0, OpenCL
Size
Introduced14.05.2016 14.05.2016
Manufacturerhttp://www.amd.com/en-us/products/graphi...http://www.amd.com/en-us/products/graphi...
Core1100 MHz
Shader6000 MHz

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)