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Radeon HD 6790 vs Radeon R9 M290X

Intro

The Radeon HD 6790 features core speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon R9 M290X, which features GPU core speed of 850 MHz, and 4096 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is made up of 1280 SPUs, 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 6790 150 Watts
Difference: 50 Watts (50%)

Memory Bandwidth

The Radeon R9 M290X should theoretically perform a small bit faster than the Radeon HD 6790 in general. (explain)

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

Texel Rate

The Radeon R9 M290X will be a lot (about 102%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M290X is superior to the Radeon HD 6790, by a large margin. (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 max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to 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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