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Radeon HD 6990 vs Radeon R9 M290X

Intro

The Radeon HD 6990 features a core clock frequency of 830 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 M290X, which comes with a GPU core clock speed of 850 MHz, and 4096 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1280 Stream Processors, 80 TAUs, 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 6990 375 Watts
Difference: 275 Watts (275%)

Memory Bandwidth

The Radeon HD 6990, in theory, should be much faster than the Radeon R9 M290X in general. (explain)

Radeon HD 6990 320000 MB/sec
Radeon R9 M290X 153600 MB/sec
Difference: 166400 (108%)

Texel Rate

The Radeon HD 6990 will be a lot (approximately 134%) faster with regards to AF than the Radeon R9 M290X. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon R9 M290X 68000 Mtexels/sec
Difference: 91360 (134%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6990 is a better choice, and very much so. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon R9 M290X 27200 Mpixels/sec
Difference: 25920 (95%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 6990

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 6990 Radeon R9 M290X
Manufacturer AMD AMD
Year March 2011 May 1 2014
Code Name Antilles Neptune XT
Memory 2048 MB (x2) 4096 MB
Core Speed 830 MHz (x2) 850 MHz
Memory Speed 5000 MHz (x2) 4800 MHz
Power (Max TDP) 375 watts 100 watts
Bandwidth 320000 MB/sec 153600 MB/sec
Texel Rate 159360 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 1536 (x2) 1280
Texture Mapping Units 96 (x2) 80
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 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: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling 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 that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends 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 6990

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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