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Radeon HD 4870 X2 vs Radeon RX 550

Intro

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

Compare all that to the Radeon RX 550, which comes with a clock speed of 1100 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 128-bit memory bus, and uses a 14 nm design. It features 512 SPUs, 32 TAUs, and 16 Raster Operation 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

In theory, the Radeon HD 4870 X2 is 101% faster than the Radeon RX 550 overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon HD 4870 X2 will be much (approximately 70%) more effective at anisotropic filtering than the Radeon RX 550. (explain)

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

Pixel Rate

The Radeon HD 4870 X2 will be much (about 36%) better at FSAA than the Radeon RX 550, and will be capable of handling higher resolutions better. (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 max amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach 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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