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Radeon HD 4870 2GB vs Radeon RX 460


Intro

The Radeon HD 4870 2GB has a GPU clock speed of 750 MHz, and the 2048 MB of GDDR5 RAM runs at 900 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Compare those specs to the Radeon RX 460, which makes use of a 14 nm design. AMD has set the core frequency at 1090 MHz. The GDDR5 memory is set to run at a speed of 1750 MHz on this specific model. It features 896 SPUs as well as 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 4870 2GB 150 Watts
Difference: 75 Watts (100%)

Memory Bandwidth

The Radeon HD 4870 2GB should theoretically be a small bit faster than the Radeon RX 460 overall. (explain)

Radeon HD 4870 2GB 115200 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 3200 (3%)

Texel Rate

The Radeon RX 460 is a lot (more or less 103%) faster with regards to texture filtering than the Radeon HD 4870 2GB. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 31040 (103%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 460 is superior to the Radeon HD 4870 2GB, by a large margin. (explain)

Radeon RX 460 17440 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 5440 (45%)

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

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Radeon HD 4870 2GB

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 4870 2GB Radeon RX 460
Manufacturer AMD AMD
Year Jun 25, 2008 August 2016
Code Name RV770 XT Polaris 11
Memory 2048 MB 4096 MB
Core Speed 750 MHz 1090 MHz
Memory Speed 3600 MHz 7000 MHz
Power (Max TDP) 150 watts 75 watts
Bandwidth 115200 MB/sec 112000 MB/sec
Texel Rate 30000 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 800(160x5) 896
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 14 nm
Transistors 956 million 3000 million
Bus PCIe 2.0 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 (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called 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 get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 4870 2GB

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.

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