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Radeon HD 6870 vs Radeon RX 460


Intro

The Radeon HD 6870 comes with a core clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is comprised of 1120 SPUs, 56 TAUs, and 32 ROPs.

Compare those specifications to the Radeon RX 460, which comes with clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator 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 5600 points
Radeon HD 6870 2870 points
Difference: 2730 (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

As far as performance goes, the Radeon HD 6870 should in theory be a bit superior to the Radeon RX 460 in general. (explain)

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

Texel Rate

The Radeon RX 460 should be quite a bit (approximately 21%) faster with regards to AF than the Radeon HD 6870. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6870 is the winner, and very much so. (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

Radeon RX 460

Amazon.com

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 largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 are applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 6870

Amazon.com

Radeon RX 460

Amazon.com

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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