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Radeon HD 6950 2GB vs Radeon R9 380 4G

Intro

The Radeon HD 6950 2GB has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1408 SPUs as well as 88 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon R9 380 4G, which features GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 4G 190 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 10 Watts (5%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 4G should in theory be a bit better than the Radeon HD 6950 2GB overall. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 22400 (14%)

Texel Rate

The Radeon R9 380 4G will be much (approximately 54%) better at AF than the Radeon HD 6950 2GB. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon HD 6950 2GB 70400 Mtexels/sec
Difference: 38240 (54%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 380 4G is a better choice, by a large margin. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 5440 (21%)

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 6950 2GB

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 6950 2GB Radeon R9 380 4G
Manufacturer AMD AMD
Year December 2010 June 2015
Code Name Cayman Pro Antigua PRO
Memory 2048 MB 4096 MB
Core Speed 800 MHz 970 MHz
Memory Speed 5000 MHz 5700 MHz
Power (Max TDP) 200 watts 190 watts
Bandwidth 160000 MB/sec 182400 MB/sec
Texel Rate 70400 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1408 1792
Texture Mapping Units 88 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 5000 million
Bus PCIe x16 PCIe 3.0 ×16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one 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 called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6950 2GB

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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