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Radeon HD 6950 2GB vs Radeon R9 270X

Intro

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

Compare all of that to the Radeon R9 270X, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 1400 MHz on this specific model. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X 180 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 20 Watts (11%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270X should perform a small bit faster than the Radeon HD 6950 2GB in general. (explain)

Radeon R9 270X 179200 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 19200 (12%)

Texel Rate

The Radeon R9 270X is just a bit (more or less 14%) better at anisotropic filtering than the Radeon HD 6950 2GB. (explain)

Radeon R9 270X 80000 Mtexels/sec
Radeon HD 6950 2GB 70400 Mtexels/sec
Difference: 9600 (14%)

Pixel Rate

The Radeon R9 270X is quite a bit (more or less 25%) better at FSAA than the Radeon HD 6950 2GB, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 6400 (25%)

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

Radeon R9 270X

Amazon.com

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 270X
Manufacturer AMD AMD
Year December 2010 October 2013
Code Name Cayman Pro Curacao XT
Memory 2048 MB 2048 MB
Core Speed 800 MHz 1000 MHz
Memory Speed 5000 MHz 5600 MHz
Power (Max TDP) 200 watts 180 watts
Bandwidth 160000 MB/sec 179200 MB/sec
Texel Rate 70400 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 1408 1280
Texture Mapping Units 88 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - 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

Radeon R9 270X

Amazon.com

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.

Comments

One Response to “Radeon HD 6950 2GB vs Radeon R9 270X”
Simon says:

Thank you so much for this very helpfull page 🙂

I was looking for an answer if my "old" HD 6950 or the "new" R9 270x is the better choice especially about the task "heat". Cause my graphic cards always go up to 70+ °C.
Keep it up 🙂

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