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Radeon R9 380 4G vs Radeon R9 M280X

Intro

The Radeon R9 380 4G has core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 RAM. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M280X, which comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X 75 Watts
Radeon R9 380 4G 190 Watts
Difference: 115 Watts (153%)

Memory Bandwidth

The Radeon R9 380 4G, in theory, should be quite a bit faster than the Radeon R9 M280X in general. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon R9 M280X 88000 MB/sec
Difference: 94400 (107%)

Texel Rate

The Radeon R9 380 4G is a lot (approximately 116%) faster with regards to AF than the Radeon R9 M280X. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon R9 M280X 50400 Mtexels/sec
Difference: 58240 (116%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon R9 M280X, by a large margin. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon R9 M280X 14400 Mpixels/sec
Difference: 16640 (116%)

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

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Radeon R9 M280X

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 380 4G Radeon R9 M280X
Manufacturer AMD AMD
Year June 2015 Feb 9 2015
Code Name Antigua PRO Saturn XT
Memory 4096 MB 4096 MB
Core Speed 970 MHz 900 MHz
Memory Speed 5700 MHz 5500 MHz
Power (Max TDP) 190 watts 75 watts
Bandwidth 182400 MB/sec 88000 MB/sec
Texel Rate 108640 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 31040 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 1792 896
Texture Mapping Units 112 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-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 max amount of information (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core clock 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 applied per second.

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

Display Prices

Hide Prices

Radeon R9 380 4G

Amazon.com

Check prices at:

Radeon R9 M280X

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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