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Radeon R9 285 vs Radeon R9 380 2G

Intro

The Radeon R9 285 comes with a GPU clock speed of 918 MHz, and the 2048 MB of GDDR5 memory is set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 32 ROPs.

Compare those specs to the Radeon R9 380 2G, which comes with a core clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, 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 380 2G 8850 points
Radeon R9 285 8500 points
Difference: 350 (4%)

Ethereum Mining Hash Rate

Radeon R9 380 2G 19 Mh/s
Radeon R9 285 18 Mh/s
Difference: 1 (6%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The Radeon R9 380 2G should theoretically perform just a bit faster than the Radeon R9 285 overall. (explain)

Radeon R9 380 2G 182400 MB/sec
Radeon R9 285 176000 MB/sec
Difference: 6400 (4%)

Texel Rate

The Radeon R9 380 2G should be a little bit (approximately 6%) faster with regards to texture filtering than the Radeon R9 285. (explain)

Radeon R9 380 2G 108640 Mtexels/sec
Radeon R9 285 102816 Mtexels/sec
Difference: 5824 (6%)

Pixel Rate

The Radeon R9 380 2G will be a little bit (more or less 6%) faster with regards to AA than the Radeon R9 285, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 380 2G 31040 Mpixels/sec
Radeon R9 285 29376 Mpixels/sec
Difference: 1664 (6%)

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 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 285 Radeon R9 380 2G
Manufacturer AMD AMD
Year September 2014 June 2015
Code Name Tonga PRO Antigua PRO
Memory 2048 MB 2048 MB
Core Speed 918 MHz 970 MHz
Memory Speed 5500 MHz 5700 MHz
Power (Max TDP) 190 watts 190 watts
Bandwidth 176000 MB/sec 182400 MB/sec
Texel Rate 102816 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 29376 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1792 1792
Texture Mapping Units 112 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 5000 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.4 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon R9 285

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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