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Radeon HD 6950 2GB vs Radeon R9 M390X

Intro

The Radeon HD 6950 2GB features a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It features 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 M390X, which features core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X 125 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 75 Watts (60%)

Memory Bandwidth

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

Texel Rate

The Radeon R9 M390X will be a lot (more or less 31%) more effective at AF than the Radeon HD 6950 2GB. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon HD 6950 2GB 70400 Mtexels/sec
Difference: 22144 (31%)

Pixel Rate

The Radeon HD 6950 2GB is just a bit (approximately 11%) better at anti-aliasing than the Radeon R9 M390X, and able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 2464 (11%)

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 M390X

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 M390X
Manufacturer AMD AMD
Year December 2010 2015
Code Name Cayman Pro Tonga
Memory 2048 MB 4096 MB
Core Speed 800 MHz 723 MHz
Memory Speed 5000 MHz 5000 MHz
Power (Max TDP) 200 watts 125 watts
Bandwidth 160000 MB/sec 160000 MB/sec
Texel Rate 70400 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 1408 2048
Texture Mapping Units 88 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6950 2GB

Amazon.com

Check prices at:

Radeon R9 M390X

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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