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Radeon R9 285 vs Radeon R9 M290X

Intro

The Radeon R9 285 comes with core clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Compare all that to the Radeon R9 M290X, which comes with a GPU core clock speed of 850 MHz, and 4096 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X 100 Watts
Radeon R9 285 190 Watts
Difference: 90 Watts (90%)

Memory Bandwidth

Theoretically, the Radeon R9 285 should be a small bit faster than the Radeon R9 M290X overall. (explain)

Radeon R9 285 176000 MB/sec
Radeon R9 M290X 153600 MB/sec
Difference: 22400 (15%)

Texel Rate

The Radeon R9 285 will be a lot (about 51%) faster with regards to anisotropic filtering than the Radeon R9 M290X. (explain)

Radeon R9 285 102816 Mtexels/sec
Radeon R9 M290X 68000 Mtexels/sec
Difference: 34816 (51%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 285 is the winner, not by a very large margin though. (explain)

Radeon R9 285 29376 Mpixels/sec
Radeon R9 M290X 27200 Mpixels/sec
Difference: 2176 (8%)

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 285

Amazon.com

Check prices at:

Radeon R9 M290X

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.

Specifications

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Model Radeon R9 285 Radeon R9 M290X
Manufacturer AMD AMD
Year September 2014 May 1 2014
Code Name Tonga PRO Neptune XT
Memory 2048 MB 4096 MB
Core Speed 918 MHz 850 MHz
Memory Speed 5500 MHz 4800 MHz
Power (Max TDP) 190 watts 100 watts
Bandwidth 176000 MB/sec 153600 MB/sec
Texel Rate 102816 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 29376 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1792 1280
Texture Mapping Units 112 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 5000 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 11.2
OpenGL Version OpenGL 4.4 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon R9 285

Amazon.com

Check prices at:

Radeon R9 M290X

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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