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Radeon HD 6950 2GB vs Radeon R9 270X

Intro

The Radeon HD 6950 2GB makes use of a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory works at a speed of 1250 MHz on this model. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

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

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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, the Radeon R9 270X should perform just a bit faster than the Radeon HD 6950 2GB overall. (explain)

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

Texel Rate

The Radeon R9 270X is a little bit (more or less 14%) more effective 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 will be much (approximately 25%) better at FSAA than the Radeon HD 6950 2GB, and should be capable of handling higher screen resolutions better. (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

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Radeon R9 270X

Amazon.com

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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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 6950 2GB

Amazon.com

Check prices at:

Radeon R9 270X

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.

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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