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Radeon HD 4870 X2 vs Radeon RX 470

Intro

The Radeon HD 4870 X2 comes with core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon RX 470, which features core clock speeds of 926 MHz on the GPU, and 1650 MHz on the 8192 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator 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

As far as performance goes, the Radeon HD 4870 X2 should in theory be just a bit better 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 (more or less 98%) better at anisotropic filtering 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

The Radeon RX 470 will be much (about 23%) better at AA than the Radeon HD 4870 X2, and also able to handle higher screen resolutions without slowing down too much. (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

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.

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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

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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