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Radeon HD 6870 vs Radeon RX 550

Intro

The Radeon HD 6870 features a GPU core speed of 900 MHz, and the 1024 MB of GDDR5 RAM runs at 1050 MHz through a 256-bit bus. It also features 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon RX 550, which comes with a core clock frequency of 1100 MHz and a GDDR5 memory frequency of 1750 MHz. It also uses a 128-bit memory bus, and uses a 14 nm design. It is comprised of 512 SPUs, 32 Texture Address Units, and 16 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 550 3507 points
Radeon HD 6870 2870 points
Difference: 637 (22%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550 50 Watts
Radeon HD 6870 151 Watts
Difference: 101 Watts (202%)

Memory Bandwidth

Performance-wise, the Radeon HD 6870 should in theory be a small bit better than the Radeon RX 550 overall. (explain)

Radeon HD 6870 134400 MB/sec
Radeon RX 550 114688 MB/sec
Difference: 19712 (17%)

Texel Rate

The Radeon HD 6870 should be much (approximately 43%) more effective at anisotropic filtering than the Radeon RX 550. (explain)

Radeon HD 6870 50400 Mtexels/sec
Radeon RX 550 35200 Mtexels/sec
Difference: 15200 (43%)

Pixel Rate

The Radeon HD 6870 is a lot (approximately 64%) faster with regards to AA than the Radeon RX 550, and also should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon RX 550 17600 Mpixels/sec
Difference: 11200 (64%)

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 6870

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 6870 Radeon RX 550
Manufacturer AMD AMD
Year October 2010 April 2017
Code Name Barts XT Polaris 12
Memory 1024 MB 2048 MB
Core Speed 900 MHz 1100 MHz
Memory Speed 4200 MHz 7000 MHz
Power (Max TDP) 151 watts 50 watts
Bandwidth 134400 MB/sec 114688 MB/sec
Texel Rate 50400 Mtexels/sec 35200 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 1120 512
Texture Mapping Units 56 32
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 14 nm
Transistors 1700 million 2200 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 6870

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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