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GeForce GTX 260 vs Radeon HD 6970

Intro

The GeForce GTX 260 has core clock speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 RAM. It features 192 SPUs as well as 64 Texture Address Units and 28 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6970, which uses a 40 nm design. AMD has set the core speed at 880 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this particular model. It features 1536 SPUs as well as 96 Texture Address Units and 32 Rasterization Operator Units.

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 theoretically be quite a bit superior to the GeForce GTX 260 in general. (explain)

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

Texel Rate

The Radeon HD 6970 will be much (about 129%) faster with regards to AF than the GeForce GTX 260. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6970 is superior to the GeForce GTX 260, 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

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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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

GeForce GTX 260

Radeon HD 6970

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