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GeForce GTX 460 1GB vs Radeon HD 6870

Intro

The GeForce GTX 460 1GB has a core clock speed of 675 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is made up of 336 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon HD 6870, which has a core clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 1120 SPUs, 56 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
GeForce GTX 460 1GB 160 Watts
Difference: 9 Watts (6%)

Memory Bandwidth

Performance-wise, the Radeon HD 6870 should theoretically be a bit superior to the GeForce GTX 460 1GB overall. (explain)

Radeon HD 6870 134400 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 19200 (17%)

Texel Rate

The Radeon HD 6870 is a lot (more or less 33%) more effective at texture filtering than the GeForce GTX 460 1GB. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GTX 460 1GB 37800 Mtexels/sec
Difference: 12600 (33%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6870 is a better choice, by a large margin. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GTX 460 1GB 21600 Mpixels/sec
Difference: 7200 (33%)

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 1GB

Amazon.com

Radeon HD 6870

Amazon.com

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 1GB Radeon HD 6870
Manufacturer nVidia AMD
Year July 2010 October 2010
Code Name GF104 Barts XT
Memory 1024 MB 1024 MB
Core Speed 675 MHz 900 MHz
Memory Speed 3600 MHz 4200 MHz
Power (Max TDP) 160 watts 151 watts
Bandwidth 115200 MB/sec 134400 MB/sec
Texel Rate 37800 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 336 1120
Texture Mapping Units 56 56
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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Comments

One Response to “GeForce GTX 460 1GB vs Radeon HD 6870”
sam says:

Am a fan of Nvdia graphic cards i have an old 1gb 9400gt and i was planing to upgrade to the high performance Gtx to 150£ MAX but since am in this WEBSITE I thing am buying an Ati card they have better performance an cheaper then the Nvdia so am thinking 6870 is my choice

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