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GeForce GTX 460 2GB vs Radeon HD 6850

Intro

The GeForce GTX 460 2GB features a core clock frequency of 675 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It features 336 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 6850, which features clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs along with 48 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 460 2GB 160 Watts
Difference: 33 Watts (26%)

Memory Bandwidth

The Radeon HD 6850 should in theory perform a little bit faster than the GeForce GTX 460 2GB overall. (explain)

Radeon HD 6850 128000 MB/sec
GeForce GTX 460 2GB 115200 MB/sec
Difference: 12800 (11%)

Texel Rate

The GeForce GTX 460 2GB is a little bit (about 2%) more effective at texture filtering than the Radeon HD 6850. (explain)

GeForce GTX 460 2GB 37800 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 600 (2%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6850 is superior to the GeForce GTX 460 2GB, but not by far. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 460 2GB 21600 Mpixels/sec
Difference: 3200 (15%)

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 460 2GB

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 460 2GB Radeon HD 6850
Manufacturer nVidia AMD
Year July 2010 October 2010
Code Name GF104 Barts Pro
Memory 2048 MB 1024 MB
Core Speed 675 MHz 775 MHz
Memory Speed 3600 MHz 4000 MHz
Power (Max TDP) 160 watts 127 watts
Bandwidth 115200 MB/sec 128000 MB/sec
Texel Rate 37800 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 336 960
Texture Mapping Units 56 48
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1950 million 1700 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better 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 amount of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 460 2GB

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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