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Radeon HD 6950 vs Radeon R9 270X

Intro

The Radeon HD 6950 makes use of a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM works at a speed 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 270X, which features a clock speed of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It features 1280 SPUs, 80 TAUs, and 32 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 270X 6590 points
Radeon HD 6950 3240 points
Difference: 3350 (103%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 270X, in theory, should be just a bit faster than the Radeon HD 6950 overall. (explain)

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

Texel Rate

The Radeon R9 270X will be a little bit (more or less 14%) faster with regards to anisotropic filtering than the Radeon HD 6950. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 270X is a better choice, by a large margin. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon HD 6950 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

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 Radeon R9 270X
Manufacturer AMD AMD
Year December 2010 October 2013
Code Name Cayman Pro Curacao XT
Memory 1024 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 largest amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 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 amount of texture map elements (texels) that can be applied per second. This figure 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 in one 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. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 6950

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.

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