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Radeon HD 5970 vs Radeon RX 460


Intro

The Radeon HD 5970 uses a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 memory is set to run at a frequency of 1000 MHz on this particular model. It features 1600 SPUs as well as 160 Texture Address Units and 64 Rasterization Operator Units.

Compare those specs to the Radeon RX 460, which has GPU clock speed of 1090 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 75 Watts
Radeon HD 5970 294 Watts
Difference: 219 Watts (292%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5970 should perform a lot faster than the Radeon RX 460 in general. (explain)

Radeon HD 5970 256000 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 144000 (129%)

Texel Rate

The Radeon HD 5970 will be a lot (about 280%) more effective at texture filtering than the Radeon RX 460. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon RX 460 61040 Mtexels/sec
Difference: 170960 (280%)

Pixel Rate

The Radeon HD 5970 should be much (about 432%) better at FSAA than the Radeon RX 460, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon RX 460 17440 Mpixels/sec
Difference: 75360 (432%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Radeon HD 5970

Radeon RX 460

Specifications

Display Specifications

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Model Radeon HD 5970 Radeon RX 460
Manufacturer AMD AMD
Year November 2009 August 2016
Code Name Hemlock XT Polaris 11
Memory 1024 MB (x2) 4096 MB
Core Speed 725 MHz (x2) 1090 MHz
Memory Speed 4000 MHz (x2) 7000 MHz
Power (Max TDP) 294 watts 75 watts
Bandwidth 256000 MB/sec 112000 MB/sec
Texel Rate 232000 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 1600 (x2) 896
Texture Mapping Units 160 (x2) 56
Render Output Units 64 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 40 nm 14 nm
Transistors 2154 million 3000 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 are processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Radeon HD 5970

Radeon RX 460

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