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GeForce GTX 260 vs Radeon HD 6970


Intro

The GeForce GTX 260 makes use of a 65 nm design. nVidia has set the core speed at 576 MHz. The GDDR3 RAM is set to run at a frequency of 999 MHz on this model. It features 192 SPUs as well as 64 TAUs and 28 Rasterization Operator Units.

Compare those specs to the Radeon HD 6970, which features clock speeds of 880 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 182 Watts
Radeon HD 6970 250 Watts
Difference: 68 Watts (37%)

Memory Bandwidth

Performance-wise, the Radeon HD 6970 should in theory be much better than the GeForce GTX 260 overall. (explain)

Radeon HD 6970 176000 MB/sec
GeForce GTX 260 111888 MB/sec
Difference: 64112 (57%)

Texel Rate

The Radeon HD 6970 should be a lot (approximately 129%) better at texture filtering than the GeForce GTX 260. (explain)

Radeon HD 6970 84480 Mtexels/sec
GeForce GTX 260 36864 Mtexels/sec
Difference: 47616 (129%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6970 is the winner, and very much so. (explain)

Radeon HD 6970 28160 Mpixels/sec
GeForce GTX 260 16128 Mpixels/sec
Difference: 12032 (75%)

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

GeForce GTX 260

Radeon HD 6970

Specifications

Display Specifications

Hide Specifications

Model GeForce GTX 260 Radeon HD 6970
Manufacturer nVidia AMD
Year June 16, 2008 December 2010
Code Name G200 Cayman XT
Memory 896 MB 2048 MB
Core Speed 576 MHz 880 MHz
Memory Speed 1998 MHz 5500 MHz
Power (Max TDP) 182 watts 250 watts
Bandwidth 111888 MB/sec 176000 MB/sec
Texel Rate 36864 Mtexels/sec 84480 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 28160 Mpixels/sec
Unified Shaders 192 1536
Texture Mapping Units 64 96
Render Output Units 28 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 2640 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 are applied per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

GeForce GTX 260

Radeon HD 6970

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