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Geforce GTX 670 vs Radeon HD 6950

Intro

The Geforce GTX 670 has a GPU core speed of 915 MHz, and the 2048 MB of GDDR5 memory is set to run at 1500 MHz through a 256-bit bus. It also is comprised of 1344 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 6950, which uses a 40 nm design. AMD has clocked 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 as well as 88 Texture Address Units and 32 Rasterization Operator 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

Geforce GTX 670 7351 points
Radeon HD 6950 3240 points
Difference: 4111 (127%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Geforce GTX 670 should in theory be just a bit superior to the Radeon HD 6950 in general. (explain)

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

Texel Rate

The Geforce GTX 670 is much (approximately 46%) faster with regards to anisotropic filtering than the Radeon HD 6950. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 670 is a better choice, but not by far. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 6950 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

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Radeon HD 6950

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 Geforce GTX 670 Radeon HD 6950
Manufacturer nVidia AMD
Year May 2012 December 2010
Code Name GK104 Cayman Pro
Memory 2048 MB 1024 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 information (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. 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 faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount 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 is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 6950

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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