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Radeon HD 3870 X2 1GB vs Radeon RX 460 2GB

Intro

The Radeon HD 3870 X2 1GB has clock speeds of 825 MHz on the GPU, and 1126 MHz on the 1024 MB of GDDR4 RAM. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

Compare all of that to the Radeon RX 460 2GB, which features core speeds of 1090 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 memory. 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 speaking, the Radeon HD 3870 X2 1GB should be 29% quicker than the Radeon RX 460 2GB overall, due to its greater bandwidth. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
Radeon RX 460 2GB 112000 MB/sec
Difference: 32128 (29%)

Texel Rate

The Radeon RX 460 2GB is quite a bit (more or less 131%) better at texture filtering than the Radeon HD 3870 X2 1GB. (explain)

Radeon RX 460 2GB 61040 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 34640 (131%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 3870 X2 1GB is a better choice, and very much so. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Radeon RX 460 2GB 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 2GB

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 2GB
Manufacturer AMD AMD
Year Jan 28, 2008 August 2016
Code Name R680 Polaris 11
Memory 1024 MB (x2) 2048 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 largest amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential 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 2GB

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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