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Geforce GTX 670 vs Radeon HD 6950 2GB

Intro

The Geforce GTX 670 comes with core clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 TAUs and 32 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6950 2GB, which uses 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 card. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670 170 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 30 Watts (18%)

Memory Bandwidth

The Geforce GTX 670 should in theory be a little bit faster than the Radeon HD 6950 2GB in general. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 32000 (20%)

Texel Rate

The Geforce GTX 670 will be quite a bit (approximately 46%) faster with regards to AF than the Radeon HD 6950 2GB. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 6950 2GB 70400 Mtexels/sec
Difference: 32080 (46%)

Pixel Rate

The Geforce GTX 670 is just a bit (approximately 14%) better at anti-aliasing than the Radeon HD 6950 2GB, and also should be able to handle higher resolutions more effectively. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 3680 (14%)

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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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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 Geforce GTX 670 Radeon HD 6950 2GB
Manufacturer nVidia AMD
Year May 2012 December 2010
Code Name GK104 Cayman Pro
Memory 2048 MB 2048 MB
Core Speed 915 MHz 800 MHz
Memory Speed 6000 MHz 5000 MHz
Power (Max TDP) 170 watts 200 watts
Bandwidth 192000 MB/sec 160000 MB/sec
Texel Rate 102480 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1344 1408
Texture Mapping Units 112 88
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 3540 million 2640 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. 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 fill rate is also dependant 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

Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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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