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Radeon R9 270X vs Radeon R9 M290X

Intro

The Radeon R9 270X features clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

Compare that to the Radeon R9 M290X, which features GPU clock speed of 850 MHz, and 4096 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X 100 Watts
Radeon R9 270X 180 Watts
Difference: 80 Watts (80%)

Memory Bandwidth

Performance-wise, the Radeon R9 270X should in theory be a little bit superior to the Radeon R9 M290X overall. (explain)

Radeon R9 270X 179200 MB/sec
Radeon R9 M290X 153600 MB/sec
Difference: 25600 (17%)

Texel Rate

The Radeon R9 270X is a small bit (about 18%) faster with regards to AF than the Radeon R9 M290X. (explain)

Radeon R9 270X 80000 Mtexels/sec
Radeon R9 M290X 68000 Mtexels/sec
Difference: 12000 (18%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 270X is the winner, though not by far. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon R9 M290X 27200 Mpixels/sec
Difference: 4800 (18%)

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 270X

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 270X Radeon R9 M290X
Manufacturer AMD AMD
Year October 2013 May 1 2014
Code Name Curacao XT Neptune XT
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 850 MHz
Memory Speed 5600 MHz 4800 MHz
Power (Max TDP) 180 watts 100 watts
Bandwidth 179200 MB/sec 153600 MB/sec
Texel Rate 80000 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1280 1280
Texture Mapping Units 80 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon R9 270X

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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