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Radeon HD 4870 512MB vs Radeon RX 550

Intro

The Radeon HD 4870 512MB has clock speeds of 750 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon RX 550, which makes use of a 14 nm design. AMD has clocked the core speed at 1100 MHz. The GDDR5 RAM runs at a speed of 1750 MHz on this model. It features 512 SPUs as well as 32 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550 50 Watts
Radeon HD 4870 512MB 150 Watts
Difference: 100 Watts (200%)

Memory Bandwidth

The Radeon HD 4870 512MB should in theory be a bit faster than the Radeon RX 550 overall. (explain)

Radeon HD 4870 512MB 115200 MB/sec
Radeon RX 550 114688 MB/sec
Difference: 512 (0%)

Texel Rate

The Radeon RX 550 should be a little bit (about 17%) more effective at AF than the Radeon HD 4870 512MB. (explain)

Radeon RX 550 35200 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 5200 (17%)

Pixel Rate

The Radeon RX 550 will be quite a bit (approximately 47%) better at AA than the Radeon HD 4870 512MB, and also capable of handling higher screen resolutions better. (explain)

Radeon RX 550 17600 Mpixels/sec
Radeon HD 4870 512MB 12000 Mpixels/sec
Difference: 5600 (47%)

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.

Price Comparison

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Radeon HD 4870 512MB

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 512MB Radeon RX 550
Manufacturer AMD AMD
Year Jun 25, 2008 April 2017
Code Name RV770 XT Polaris 12
Memory 512 MB 2048 MB
Core Speed 750 MHz 1100 MHz
Memory Speed 3600 MHz 7000 MHz
Power (Max TDP) 150 watts 50 watts
Bandwidth 115200 MB/sec 114688 MB/sec
Texel Rate 30000 Mtexels/sec 35200 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 800(160x5) 512
Texture Mapping Units 40 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 14 nm
Transistors 956 million 2200 million
Bus PCIe 2.0 x16 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 max amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 512MB

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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