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Radeon HD 4870 X2 vs Radeon RX 470 4GB

Intro

The Radeon HD 4870 X2 uses a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM works at a frequency of 900 MHz on this particular card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon RX 470 4GB, which uses a 14 nm design. AMD has clocked the core frequency at 926 MHz. The GDDR5 memory works at a speed of 1650 MHz on this model. 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 4GB 120 Watts
Radeon HD 4870 X2 350 Watts
Difference: 230 Watts (192%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 is 9% quicker than the Radeon RX 470 4GB overall, due to its greater bandwidth. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon RX 470 4GB 211200 MB/sec
Difference: 19200 (9%)

Texel Rate

The Radeon RX 470 4GB is quite a bit (approximately 98%) more effective at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 470 4GB 118528 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 58528 (98%)

Pixel Rate

The Radeon RX 470 4GB should be quite a bit (more or less 23%) faster with regards to FSAA than the Radeon HD 4870 X2, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 470 4GB 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 4GB

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 4870 X2 Radeon RX 470 4GB
Manufacturer AMD AMD
Year Aug 12, 2008 August 2016
Code Name R700 Polaris 10
Memory 1024 MB (x2) 4096 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 largest amount of data (counted in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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

Display Prices

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 470 4GB

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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