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Radeon R9 M390X vs Radeon RX 470

Intro

The Radeon R9 M390X features core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Compare those specifications to the Radeon RX 470, which has a GPU core clock speed of 926 MHz, and 8192 MB of GDDR5 memory set to run at 1650 MHz through a 256-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon R9 M390X 125 Watts
Difference: 5 Watts (4%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 470 should be a lot faster than the Radeon R9 M390X in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon R9 M390X 160000 MB/sec
Difference: 51200 (32%)

Texel Rate

The Radeon RX 470 will be much (more or less 28%) faster with regards to AF than the Radeon R9 M390X. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 25984 (28%)

Pixel Rate

The Radeon RX 470 will be much (more or less 28%) more effective at full screen anti-aliasing than the Radeon R9 M390X, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 6496 (28%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon R9 M390X

Amazon.com

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Radeon RX 470

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon R9 M390X Radeon RX 470
Manufacturer AMD AMD
Year 2015 August 2016
Code Name Tonga Polaris 10
Memory 4096 MB 8192 MB
Core Speed 723 MHz 926 MHz
Memory Speed 5000 MHz 6600 MHz
Power (Max TDP) 125 watts 120 watts
Bandwidth 160000 MB/sec 211200 MB/sec
Texel Rate 92544 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 23136 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 2048 2048
Texture Mapping Units 128 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors (Unknown) million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon R9 M390X

Amazon.com

Check prices at:

Radeon RX 470

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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