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Radeon HD 3870 X2 1GB vs Radeon RX 460

Intro

The Radeon HD 3870 X2 1GB makes use of a 55 nm design. AMD has set the core speed at 825 MHz. The GDDR4 memory works at a frequency of 1126 MHz on this particular model. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 ROPs.

Compare that to the Radeon RX 460, which uses a 14 nm design. AMD has clocked the core frequency at 1090 MHz. The GDDR5 memory is set to run at a frequency of 1750 MHz on this particular card. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 3870 X2 1GB should be much faster than the Radeon RX 460 overall. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 32128 (29%)

Texel Rate

The Radeon RX 460 is quite a bit (about 131%) more effective at AF than the Radeon HD 3870 X2 1GB. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 34640 (131%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 3870 X2 1GB is the winner, by far. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Radeon RX 460 17440 Mpixels/sec
Difference: 8960 (51%)

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 3870 X2 1GB

Amazon.com

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Radeon RX 460

Amazon.com

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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 3870 X2 1GB Radeon RX 460
Manufacturer AMD AMD
Year Jan 28, 2008 August 2016
Code Name R680 Polaris 11
Memory 1024 MB (x2) 4096 MB
Core Speed 825 MHz (x2) 1090 MHz
Memory Speed 2252 MHz (x2) 7000 MHz
Power (Max TDP) (Unknown) watts 75 watts
Bandwidth 144128 MB/sec 112000 MB/sec
Texel Rate 26400 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 26400 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 320(64x5) (x2) 896
Texture Mapping Units 16 (x2) 56
Render Output Units 16 (x2) 16
Bus Type GDDR4 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 14 nm
Transistors (Unknown) million 3000 million
Bus PCIe 2.0 x16/(internal PCIe 1.1 x16) PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 are applied per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better 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 maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

Radeon RX 460

Amazon.com

Check prices at:

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.

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