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Radeon R9 270 vs Radeon RX 470


Intro

The Radeon R9 270 features a GPU core clock speed of 900 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1400 MHz through a 256-bit bus. It also is comprised of 1280 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon RX 470, which makes use of a 14 nm design. AMD has set the core frequency at 926 MHz. The GDDR5 RAM is set to run at a speed of 1650 MHz on this card. It features 2048 SPUs along with 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 270 5940 points
Difference: 5870 (99%)

Ethereum Mining Hash Rate

Radeon RX 470 26 Mh/s
Radeon R9 270 15 Mh/s
Difference: 11 (73%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon R9 270 150 Watts
Difference: 30 Watts (25%)

Memory Bandwidth

Theoretically, the Radeon RX 470 should be a bit faster than the Radeon R9 270 in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon R9 270 179200 MB/sec
Difference: 32000 (18%)

Texel Rate

The Radeon RX 470 is much (approximately 65%) better at anisotropic filtering than the Radeon R9 270. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon R9 270 72000 Mtexels/sec
Difference: 46528 (65%)

Pixel Rate

The Radeon RX 470 should be a little bit (about 3%) more effective at AA than the Radeon R9 270, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon R9 270 28800 Mpixels/sec
Difference: 832 (3%)

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 270

Radeon RX 470

Specifications

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Model Radeon R9 270 Radeon RX 470
Manufacturer AMD AMD
Year November 2013 August 2016
Code Name Curacao Pro Polaris 10
Memory 2048 MB 8192 MB
Core Speed 900 MHz 926 MHz
Memory Speed 5600 MHz 6600 MHz
Power (Max TDP) 150 watts 120 watts
Bandwidth 179200 MB/sec 211200 MB/sec
Texel Rate 72000 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1280 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 2800 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
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 data (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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

Radeon R9 270

Radeon RX 470

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