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Radeon HD 4870 X2 vs Radeon RX 580

Intro

The Radeon HD 4870 X2 features core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare all that to the Radeon RX 580, which uses a 14 nm design. AMD has set the core speed at 1257 MHz. The GDDR5 memory works at a speed of 2000 MHz on this particular model. It features 2304 SPUs as well as 144 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580 185 Watts
Radeon HD 4870 X2 350 Watts
Difference: 165 Watts (89%)

Memory Bandwidth

As far as performance goes, the Radeon RX 580 should in theory be a small bit better than the Radeon HD 4870 X2 in general. (explain)

Radeon RX 580 262144 MB/sec
Radeon HD 4870 X2 230400 MB/sec
Difference: 31744 (14%)

Texel Rate

The Radeon RX 580 is much (approximately 202%) more effective at anisotropic filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 580 181008 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 121008 (202%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 580 is superior to the Radeon HD 4870 X2, by far. (explain)

Radeon RX 580 40224 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 16224 (68%)

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 580

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 580
Manufacturer AMD AMD
Year Aug 12, 2008 April 2017
Code Name R700 Polaris 20
Memory 1024 MB (x2) 8192 MB
Core Speed 750 MHz (x2) 1257 MHz
Memory Speed 3600 MHz (x2) 8000 MHz
Power (Max TDP) 350 watts 185 watts
Bandwidth 230400 MB/sec 262144 MB/sec
Texel Rate 60000 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 800(160x5) (x2) 2304
Texture Mapping Units 40 (x2) 144
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 (in units of megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount 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 of the card - 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 580

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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