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Radeon HD 6790 vs Radeon R9 M290X

Intro

The Radeon HD 6790 features a core clock frequency of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 800 SPUs, 40 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon R9 M290X, which has a clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X 100 Watts
Radeon HD 6790 150 Watts
Difference: 50 Watts (50%)

Memory Bandwidth

In theory, the Radeon R9 M290X should be a bit faster than the Radeon HD 6790 overall. (explain)

Radeon R9 M290X 153600 MB/sec
Radeon HD 6790 134400 MB/sec
Difference: 19200 (14%)

Texel Rate

The Radeon R9 M290X is much (about 102%) faster with regards to anisotropic filtering than the Radeon HD 6790. (explain)

Radeon R9 M290X 68000 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 34400 (102%)

Pixel Rate

The Radeon R9 M290X will be a lot (more or less 102%) faster with regards to AA than the Radeon HD 6790, and able to handle higher resolutions more effectively. (explain)

Radeon R9 M290X 27200 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 13760 (102%)

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 6790

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 6790 Radeon R9 M290X
Manufacturer AMD AMD
Year April 2011 May 1 2014
Code Name Barts LE Neptune XT
Memory 1024 MB 4096 MB
Core Speed 840 MHz 850 MHz
Memory Speed 4200 MHz 4800 MHz
Power (Max TDP) 150 watts 100 watts
Bandwidth 134400 MB/sec 153600 MB/sec
Texel Rate 33600 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 13440 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 800 1280
Texture Mapping Units 40 80
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1700 million (Unknown) million
Bus PCIe 2.1 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 largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6790

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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