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Radeon HD 6990 vs Radeon R9 290

Intro

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

Compare all that to the Radeon R9 290, which features GPU clock speed of 800 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 512-bit bus. It also is made up of 2560 Stream Processors, 160 Texture Address Units, and 64 ROPs.

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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 290 9876 points
Radeon HD 6990 5820 points
Difference: 4056 (70%)

Ethereum Mining Hash Rate

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

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

Texel Rate

The Radeon HD 6990 is much (more or less 25%) more effective at texture filtering than the Radeon R9 290. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon R9 290 128000 Mtexels/sec
Difference: 31360 (25%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6990 is superior to the Radeon R9 290, though not by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon R9 290 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 290

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 290
Manufacturer AMD AMD
Year March 2011 November 2013
Code Name Antilles Hawaii PRO
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 128000 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 1536 (x2) 2560
Texture Mapping Units 96 (x2) 160
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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. 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 also depends on lots of other factors, especially the memory bandwidth of the card - 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 290

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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