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Radeon R9 280X vs Radeon R9 380 2G

Intro

The Radeon R9 280X comes with clock speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon R9 380 2G, which has GPU core speed of 970 MHz, and 2048 MB of GDDR5 memory running at 1425 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 280X 8886 points
Radeon R9 380 2G 8850 points
Difference: 36 (0%)

Ethereum Mining Hash Rate

Radeon R9 280X 21 Mh/s
Radeon R9 380 2G 19 Mh/s
Difference: 2 (11%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G 190 Watts
Radeon R9 280X 250 Watts
Difference: 60 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X is 58% faster than the Radeon R9 380 2G overall, because of its greater data rate. (explain)

Radeon R9 280X 288000 MB/sec
Radeon R9 380 2G 182400 MB/sec
Difference: 105600 (58%)

Texel Rate

The Radeon R9 280X is a bit (approximately 0%) more effective at AF than the Radeon R9 380 2G. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon R9 380 2G 108640 Mtexels/sec
Difference: 160 (0%)

Pixel Rate

The Radeon R9 380 2G will be a bit (more or less 14%) faster with regards to FSAA than the Radeon R9 280X, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 380 2G 31040 Mpixels/sec
Radeon R9 280X 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 280X

Amazon.com

Check prices at:

Radeon R9 380 2G

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 280X Radeon R9 380 2G
Manufacturer AMD AMD
Year October 2013 June 2015
Code Name Tahiti XTL Antigua PRO
Memory 3072 MB 2048 MB
Core Speed 850 MHz 970 MHz
Memory Speed 6000 MHz 5700 MHz
Power (Max TDP) 250 watts 190 watts
Bandwidth 288000 MB/sec 182400 MB/sec
Texel Rate 108800 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 2048 1792
Texture Mapping Units 128 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 11.2 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the 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 most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon R9 280X

Amazon.com

Check prices at:

Radeon R9 380 2G

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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