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Radeon HD 6990 vs Radeon R9 380 4G

Intro

The Radeon HD 6990 features clock speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon R9 380 4G, which makes use of a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 RAM is set to run at a speed of 1425 MHz on this particular card. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator 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 380 4G 8837 points
Radeon HD 6990 5820 points
Difference: 3017 (52%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
Radeon R9 380 4G 21 Mh/s
Difference: 3 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 4G 190 Watts
Radeon HD 6990 375 Watts
Difference: 185 Watts (97%)

Memory Bandwidth

Performance-wise, the Radeon HD 6990 should theoretically be much better than the Radeon R9 380 4G overall. (explain)

Radeon HD 6990 320000 MB/sec
Radeon R9 380 4G 182400 MB/sec
Difference: 137600 (75%)

Texel Rate

The Radeon HD 6990 will be quite a bit (approximately 47%) faster with regards to anisotropic filtering than the Radeon R9 380 4G. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon R9 380 4G 108640 Mtexels/sec
Difference: 50720 (47%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6990 is a better choice, by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon R9 380 4G 31040 Mpixels/sec
Difference: 22080 (71%)

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 380 4G

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 380 4G
Manufacturer AMD AMD
Year March 2011 June 2015
Code Name Antilles Antigua PRO
Memory 2048 MB (x2) 4096 MB
Core Speed 830 MHz (x2) 970 MHz
Memory Speed 5000 MHz (x2) 5700 MHz
Power (Max TDP) 375 watts 190 watts
Bandwidth 320000 MB/sec 182400 MB/sec
Texel Rate 159360 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1536 (x2) 1792
Texture Mapping Units 96 (x2) 112
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 5000 million
Bus PCIe 2.1 x16 PCIe 3.0 ×16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6990

Amazon.com

Check prices at:

Radeon R9 380 4G

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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