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Radeon HD 6870 vs Radeon R9 M290X

Intro

The Radeon HD 6870 makes use of a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory is set to run at a speed of 1050 MHz on this card. It features 1120 SPUs along with 56 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon R9 M290X, which comes with GPU clock speed of 850 MHz, and 4096 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X 100 Watts
Radeon HD 6870 151 Watts
Difference: 51 Watts (51%)

Memory Bandwidth

The Radeon R9 M290X should in theory be a small bit faster than the Radeon HD 6870 in general. (explain)

Radeon R9 M290X 153600 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 19200 (14%)

Texel Rate

The Radeon R9 M290X will be quite a bit (about 35%) faster with regards to anisotropic filtering than the Radeon HD 6870. (explain)

Radeon R9 M290X 68000 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 17600 (35%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6870 is a better choice, not by a very large margin though. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon R9 M290X 27200 Mpixels/sec
Difference: 1600 (6%)

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 R9 M290X

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 R9 M290X
Manufacturer AMD AMD
Year October 2010 May 1 2014
Code Name Barts XT Neptune XT
Memory 1024 MB 4096 MB
Core Speed 900 MHz 850 MHz
Memory Speed 4200 MHz 4800 MHz
Power (Max TDP) 151 watts 100 watts
Bandwidth 134400 MB/sec 153600 MB/sec
Texel Rate 50400 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1120 1280
Texture Mapping Units 56 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1700 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially 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 6870

Amazon.com

Check prices at:

Radeon R9 M290X

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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