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GeForce GTX 260 vs Radeon HD 6850

Intro

The GeForce GTX 260 makes use of a 65 nm design. nVidia has clocked the core frequency at 576 MHz. The GDDR3 memory runs at a speed of 999 MHz on this model. It features 192 SPUs as well as 64 Texture Address Units and 28 ROPs.

Compare that to the Radeon HD 6850, which comes with core clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs along with 48 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 260 182 Watts
Difference: 55 Watts (43%)

Memory Bandwidth

In theory, the Radeon HD 6850 should perform a bit faster than the GeForce GTX 260 in general. (explain)

Radeon HD 6850 128000 MB/sec
GeForce GTX 260 111888 MB/sec
Difference: 16112 (14%)

Texel Rate

The Radeon HD 6850 is just a bit (about 1%) more effective at texture filtering than the GeForce GTX 260. (explain)

Radeon HD 6850 37200 Mtexels/sec
GeForce GTX 260 36864 Mtexels/sec
Difference: 336 (1%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6850 is superior to the GeForce GTX 260, and very much so. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 260 16128 Mpixels/sec
Difference: 8672 (54%)

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 260

Amazon.com

Check prices at:

Radeon HD 6850

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 260 Radeon HD 6850
Manufacturer nVidia AMD
Year June 16, 2008 October 2010
Code Name G200 Barts Pro
Memory 896 MB 1024 MB
Core Speed 576 MHz 775 MHz
Memory Speed 1998 MHz 4000 MHz
Power (Max TDP) 182 watts 127 watts
Bandwidth 111888 MB/sec 128000 MB/sec
Texel Rate 36864 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 192 960
Texture Mapping Units 64 48
Render Output Units 28 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 1700 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 largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 260

Amazon.com

Check prices at:

Radeon HD 6850

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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