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Radeon HD 6950 vs Radeon R9 M390X

Intro

The Radeon HD 6950 makes use of a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this model. It features 1408 SPUs as well as 88 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M390X, which features a clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

Texel Rate

The Radeon R9 M390X is a lot (about 31%) better at AF than the Radeon HD 6950. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6950 is superior to the Radeon R9 M390X, though only just barely. (explain)

Radeon HD 6950 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

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 Radeon R9 M390X
Manufacturer AMD AMD
Year December 2010 2015
Code Name Cayman Pro Tonga
Memory 1024 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: Bandwidth is the largest amount of data (in units of MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6950

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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