Compare any two graphics cards:
Radeon R9 285 vs Radeon RX 470
IntroThe Radeon R9 285 has a core clock frequency of 918 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 TAUs, and 32 ROPs.
Compare those specifications to the Radeon RX 470, which makes use of a 14 nm design. AMD has set the core frequency at 926 MHz. The GDDR5 memory runs at a frequency of 1650 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
As far as performance goes, the Radeon RX 470 should in theory be a little bit superior to the Radeon R9 285 overall. (explain)
Texel RateThe Radeon RX 470 will be a bit (approximately 15%) faster with regards to AF than the Radeon R9 285. (explain)
Pixel RateIf running with a high screen resolution is important to you, then the Radeon RX 470 is superior to the Radeon R9 285, though only just barely. (explain)
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.
Radeon R9 285
Radeon RX 470
Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.
Radeon R9 285
Radeon RX 470