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Radeon R9 380 4G vs Radeon R9 M290X

Intro

The Radeon R9 380 4G has a core clock speed of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 112 TAUs, and 32 ROPs.

Compare all of that to the Radeon R9 M290X, which makes use of a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory runs at a speed of 1200 MHz on this card. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X 100 Watts
Radeon R9 380 4G 190 Watts
Difference: 90 Watts (90%)

Memory Bandwidth

Performance-wise, the Radeon R9 380 4G should in theory be a bit superior to the Radeon R9 M290X in general. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon R9 M290X 153600 MB/sec
Difference: 28800 (19%)

Texel Rate

The Radeon R9 380 4G should be much (more or less 60%) better at texture filtering than the Radeon R9 M290X. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon R9 M290X 68000 Mtexels/sec
Difference: 40640 (60%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 380 4G is the winner, but it probably won't make a huge difference. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon R9 M290X 27200 Mpixels/sec
Difference: 3840 (14%)

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 380 4G

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 380 4G Radeon R9 M290X
Manufacturer AMD AMD
Year June 2015 May 1 2014
Code Name Antigua PRO Neptune XT
Memory 4096 MB 4096 MB
Core Speed 970 MHz 850 MHz
Memory Speed 5700 MHz 4800 MHz
Power (Max TDP) 190 watts 100 watts
Bandwidth 182400 MB/sec 153600 MB/sec
Texel Rate 108640 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 31040 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 ×16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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

Display Prices

Hide Prices

Radeon R9 380 4G

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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