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Radeon HD 4870 X2 vs Radeon RX 470

Intro

The Radeon HD 4870 X2 features a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare those specifications to the Radeon RX 470, which features a core clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also uses a 256-bit memory bus, and uses a 14 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon HD 4870 X2 350 Watts
Difference: 230 Watts (192%)

Memory Bandwidth

The Radeon HD 4870 X2, in theory, should be a small bit faster than the Radeon RX 470 overall. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon RX 470 211200 MB/sec
Difference: 19200 (9%)

Texel Rate

The Radeon RX 470 will be quite a bit (about 98%) better at AF than the Radeon HD 4870 X2. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 58528 (98%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 470 is a better choice, by a large margin. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 5632 (23%)

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

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Radeon RX 470

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 470
Manufacturer AMD AMD
Year Aug 12, 2008 August 2016
Code Name R700 Polaris 10
Memory 1024 MB (x2) 8192 MB
Core Speed 750 MHz (x2) 926 MHz
Memory Speed 3600 MHz (x2) 6600 MHz
Power (Max TDP) 350 watts 120 watts
Bandwidth 230400 MB/sec 211200 MB/sec
Texel Rate 60000 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 800(160x5) (x2) 2048
Texture Mapping Units 40 (x2) 128
Render Output Units 16 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 55 nm 14 nm
Transistors 956 million 5700 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 maximum amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 470

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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