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Radeon HD 4870 X2 vs Radeon RX 550

Intro

The Radeon HD 4870 X2 uses a 55 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 RAM is set to run at a frequency of 900 MHz on this particular card. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon RX 550, which has clock speeds of 1100 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 RAM. It features 512 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550 50 Watts
Radeon HD 4870 X2 350 Watts
Difference: 300 Watts (600%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should theoretically be a lot superior to the Radeon RX 550 in general. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon RX 550 114688 MB/sec
Difference: 115712 (101%)

Texel Rate

The Radeon HD 4870 X2 should be much (approximately 70%) faster with regards to AF than the Radeon RX 550. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
Radeon RX 550 35200 Mtexels/sec
Difference: 24800 (70%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4870 X2 is a better choice, by a large margin. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
Radeon RX 550 17600 Mpixels/sec
Difference: 6400 (36%)

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 550

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 550
Manufacturer AMD AMD
Year Aug 12, 2008 April 2017
Code Name R700 Polaris 12
Memory 1024 MB (x2) 2048 MB
Core Speed 750 MHz (x2) 1100 MHz
Memory Speed 3600 MHz (x2) 7000 MHz
Power (Max TDP) 350 watts 50 watts
Bandwidth 230400 MB/sec 114688 MB/sec
Texel Rate 60000 Mtexels/sec 35200 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 800(160x5) (x2) 512
Texture Mapping Units 40 (x2) 32
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 2200 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 megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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

Display Prices

Hide Prices

Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 550

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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