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Radeon HD 6990 vs Radeon R9 290X

Intro

The Radeon HD 6990 has core speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon R9 290X, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 512-bit memory bus, and makes use of a 28 nm design. It features 2816 SPUs, 176 TAUs, and 64 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 290X 10609 points
Radeon HD 6990 5820 points
Difference: 4789 (82%)

Ethereum Mining Hash Rate

Radeon R9 290X 29 Mh/s
Radeon HD 6990 24 Mh/s
Difference: 5 (21%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 290X 300 Watts
Radeon HD 6990 375 Watts
Difference: 75 Watts (25%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The Radeon HD 6990 should be just a bit (about 13%) faster with regards to texture filtering than the Radeon R9 290X. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon R9 290X 140800 Mtexels/sec
Difference: 18560 (13%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6990 is a better choice, though not by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon R9 290X 51200 Mpixels/sec
Difference: 1920 (4%)

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 290X

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 290X
Manufacturer AMD AMD
Year March 2011 October 2013
Code Name Antilles Hawaii XT
Memory 2048 MB (x2) 4096 MB
Core Speed 830 MHz (x2) 800 MHz
Memory Speed 5000 MHz (x2) 5000 MHz
Power (Max TDP) 375 watts 300 watts
Bandwidth 320000 MB/sec 320000 MB/sec
Texel Rate 159360 Mtexels/sec 140800 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 1536 (x2) 2816
Texture Mapping Units 96 (x2) 176
Render Output Units 32 (x2) 64
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 512-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 6200 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 maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Display Prices

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Radeon HD 6990

Amazon.com

Check prices at:

Radeon R9 290X

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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