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Radeon HD 6870 vs Radeon RX 460

Intro

The Radeon HD 6870 comes with a clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It features 1120 SPUs, 56 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon RX 460, which comes with GPU clock speed of 1090 MHz, and 4096 MB of GDDR5 RAM set to run at 1750 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

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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 460 5595 points
Radeon HD 6870 2870 points
Difference: 2725 (95%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 75 Watts
Radeon HD 6870 151 Watts
Difference: 76 Watts (101%)

Memory Bandwidth

The Radeon HD 6870 should theoretically perform a small bit faster than the Radeon RX 460 overall. (explain)

Radeon HD 6870 134400 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 22400 (20%)

Texel Rate

The Radeon RX 460 is much (about 21%) faster with regards to texture filtering than the Radeon HD 6870. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 10640 (21%)

Pixel Rate

The Radeon HD 6870 will be much (approximately 65%) more effective at full screen anti-aliasing than the Radeon RX 460, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon RX 460 17440 Mpixels/sec
Difference: 11360 (65%)

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 460

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 460
Manufacturer AMD AMD
Year October 2010 August 2016
Code Name Barts XT Polaris 11
Memory 1024 MB 4096 MB
Core Speed 900 MHz 1090 MHz
Memory Speed 4200 MHz 7000 MHz
Power (Max TDP) 151 watts 75 watts
Bandwidth 134400 MB/sec 112000 MB/sec
Texel Rate 50400 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 1120 896
Texture Mapping Units 56 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 14 nm
Transistors 1700 million 3000 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 max amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6870

Amazon.com

Check prices at:

Radeon RX 460

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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