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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 speed at 725 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this model. It features 1600 SPUs along with 160 Texture Address Units and 64 Rasterization Operator Units.

Compare all that to the Radeon RX 460, which features a clock speed of 1090 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 128-bit memory bus, and uses a 14 nm design. It features 896 SPUs, 56 TAUs, and 16 ROPs.

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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

The Radeon HD 5970, in theory, should be 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%) better 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 a lot (about 432%) more effective at FSAA than the Radeon RX 460, and also should be able to handle higher resolutions while still performing well. (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

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Radeon HD 5970

Amazon.com

Radeon RX 460

Amazon.com

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 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 maximum amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, 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 figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

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