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Geforce GTX 680 vs Radeon HD 6950

Intro

The Geforce GTX 680 has clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon HD 6950, which uses a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory works at a speed of 1250 MHz on this particular model. It features 1408 SPUs along with 88 TAUs 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 680 7650 points
Radeon HD 6950 3240 points
Difference: 4410 (136%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680 195 Watts
Radeon HD 6950 200 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

The Geforce GTX 680 should theoretically perform just a bit faster than the Radeon HD 6950 overall. (explain)

Geforce GTX 680 192256 MB/sec
Radeon HD 6950 160000 MB/sec
Difference: 32256 (20%)

Texel Rate

The Geforce GTX 680 should be much (more or less 83%) more effective at texture filtering than the Radeon HD 6950. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 6950 70400 Mtexels/sec
Difference: 58368 (83%)

Pixel Rate

The Geforce GTX 680 should be a lot (more or less 26%) better at FSAA than the Radeon HD 6950, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 6950 25600 Mpixels/sec
Difference: 6592 (26%)

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 680

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.

Specifications

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Model Geforce GTX 680 Radeon HD 6950
Manufacturer nVidia AMD
Year March 2012 December 2010
Code Name GK104 Cayman Pro
Memory 2048 MB 1024 MB
Core Speed 1006 MHz 800 MHz
Memory Speed 6008 MHz 5000 MHz
Power (Max TDP) 195 watts 200 watts
Bandwidth 192256 MB/sec 160000 MB/sec
Texel Rate 128768 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1536 1408
Texture Mapping Units 128 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 (counted in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 figure is calculated by multiplying the total texture units by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 potential to reach the maximum fill rate.

Display Prices

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Geforce GTX 680

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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