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Radeon HD 6870 vs Radeon R9 M290X

Intro

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

Compare those specs to the Radeon R9 M290X, which comes with a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

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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

Performance-wise, the Radeon R9 M290X should in theory be a little bit superior to the Radeon HD 6870 overall. (explain)

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

Texel Rate

The Radeon R9 M290X should be a lot (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 running with lots of anti-aliasing is important to you, then the Radeon HD 6870 is superior to the Radeon R9 M290X, though not by far. (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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, 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 this number, the better the graphics card will be at 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 that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of 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

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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.

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