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Radeon R9 285 vs Radeon RX 470

Intro

The Radeon R9 285 comes with core clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon RX 470, which uses a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 memory works at a speed of 1650 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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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 RX 470 11810 points
Radeon R9 285 8464 points
Difference: 3346 (40%)

Ethereum Mining Hash Rate

Radeon RX 470 26 Mh/s
Radeon R9 285 18 Mh/s
Difference: 8 (44%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon R9 285 190 Watts
Difference: 70 Watts (58%)

Memory Bandwidth

Performance-wise, the Radeon RX 470 should in theory be a small bit better than the Radeon R9 285 in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon R9 285 176000 MB/sec
Difference: 35200 (20%)

Texel Rate

The Radeon RX 470 should be a bit (approximately 15%) more effective at AF than the Radeon R9 285. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 285 102816 Mtexels/sec
Difference: 15712 (15%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 470 is superior to the Radeon R9 285, though not by far. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon R9 285 29376 Mpixels/sec
Difference: 256 (1%)

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

Radeon R9 285

Radeon RX 470

Specifications

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Model Radeon R9 285 Radeon RX 470
Manufacturer AMD AMD
Year September 2014 August 2016
Code Name Tonga PRO Polaris 10
Memory 2048 MB 8192 MB
Core Speed 918 MHz 926 MHz
Memory Speed 5500 MHz 6600 MHz
Power (Max TDP) 190 watts 120 watts
Bandwidth 176000 MB/sec 211200 MB/sec
Texel Rate 102816 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 29376 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 5000 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.4 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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

Radeon R9 285

Radeon RX 470

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