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Radeon HD 4870 X2 vs Radeon RX 460 2GB

Intro

The Radeon HD 4870 X2 makes use of a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon RX 460 2GB, which comes with core speeds of 1090 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 memory. 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 2GB 75 Watts
Radeon HD 4870 X2 350 Watts
Difference: 275 Watts (367%)

Memory Bandwidth

In theory, the Radeon HD 4870 X2 should be much faster than the Radeon RX 460 2GB overall. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon RX 460 2GB 112000 MB/sec
Difference: 118400 (106%)

Texel Rate

The Radeon RX 460 2GB should be a bit (approximately 2%) better at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 460 2GB 61040 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 1040 (2%)

Pixel Rate

The Radeon HD 4870 X2 is a lot (more or less 38%) better at full screen anti-aliasing than the Radeon RX 460 2GB, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
Radeon RX 460 2GB 17440 Mpixels/sec
Difference: 6560 (38%)

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 4870 X2

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.

Specifications

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Model Radeon HD 4870 X2 Radeon RX 460 2GB
Manufacturer AMD AMD
Year Aug 12, 2008 August 2016
Code Name R700 Polaris 11
Memory 1024 MB (x2) 2048 MB
Core Speed 750 MHz (x2) 1090 MHz
Memory Speed 3600 MHz (x2) 7000 MHz
Power (Max TDP) 350 watts 75 watts
Bandwidth 230400 MB/sec 112000 MB/sec
Texel Rate 60000 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 800(160x5) (x2) 896
Texture Mapping Units 40 (x2) 56
Render Output Units 16 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 14 nm
Transistors 956 million 3000 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 4870 X2

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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