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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 set the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this specific card. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon R9 270X, which features core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 TAUs and 32 ROPs.

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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

In theory, the Radeon R9 270X will be 12% quicker than the Radeon HD 6950 2GB in general, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 270X will be a bit (about 14%) better at AF 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 (about 25%) more effective at FSAA than the Radeon HD 6950 2GB, and also capable of handling higher resolutions more effectively. (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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of 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 number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max 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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