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GeForce GTX 460 2GB vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 460 2GB makes use of a 40 nm design. nVidia has set the core frequency at 675 MHz. The GDDR5 RAM runs at a frequency of 900 MHz on this particular card. It features 336 SPUs along with 56 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 4850 X2 512MB, which comes with a clock speed of 625 MHz and a GDDR3 memory speed of 993 MHz. It also makes use of a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 2GB 160 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 90 Watts (56%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 X2 512MB should perform a bit faster than the GeForce GTX 460 2GB overall. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
GeForce GTX 460 2GB 115200 MB/sec
Difference: 11904 (10%)

Texel Rate

The Radeon HD 4850 X2 512MB will be much (about 32%) faster with regards to texture filtering than the GeForce GTX 460 2GB. (explain)

Radeon HD 4850 X2 512MB 50000 Mtexels/sec
GeForce GTX 460 2GB 37800 Mtexels/sec
Difference: 12200 (32%)

Pixel Rate

The GeForce GTX 460 2GB is a small bit (more or less 8%) more effective at FSAA than the Radeon HD 4850 X2 512MB, and also should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 460 2GB 21600 Mpixels/sec
Radeon HD 4850 X2 512MB 20000 Mpixels/sec
Difference: 1600 (8%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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 4850 X2 512MB
Manufacturer nVidia AMD
Year July 2010 Nov 7, 2008
Code Name GF104 R700
Memory 2048 MB 512 MB (x2)
Core Speed 675 MHz 625 MHz (x2)
Memory Speed 3600 MHz 1986 MHz (x2)
Power (Max TDP) 160 watts 250 watts
Bandwidth 115200 MB/sec 127104 MB/sec
Texel Rate 37800 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 336 800(160x5) (x2)
Texture Mapping Units 56 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR3
Bus Width 256-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 1950 million 956 million
Bus PCIe x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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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