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GeForce GTX 460 vs Radeon HD 4870 512MB

Intro

The GeForce GTX 460 comes with a GPU core clock speed of 675 MHz, and the 768 MB of GDDR5 memory is set to run at 900 MHz through a 192-bit bus. It also is made up of 336 SPUs, 56 Texture Address Units, and 24 ROPs.

Compare all of that to the Radeon HD 4870 512MB, which comes with core speeds of 750 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Radeon HD 4870 512MB should perform quite a bit faster than the GeForce GTX 460 overall. (explain)

Radeon HD 4870 512MB 115200 MB/sec
GeForce GTX 460 86400 MB/sec
Difference: 28800 (33%)

Texel Rate

The GeForce GTX 460 is much (about 26%) faster with regards to AF than the Radeon HD 4870 512MB. (explain)

GeForce GTX 460 37800 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 7800 (26%)

Pixel Rate

The GeForce GTX 460 should be quite a bit (approximately 35%) more effective at full screen anti-aliasing than the Radeon HD 4870 512MB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 460 16200 Mpixels/sec
Radeon HD 4870 512MB 12000 Mpixels/sec
Difference: 4200 (35%)

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

Display Prices

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GeForce GTX 460

Amazon.com

Check prices at:

Radeon HD 4870 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 Radeon HD 4870 512MB
Manufacturer nVidia AMD
Year July 2010 Jun 25, 2008
Code Name GF104 RV770 XT
Memory 768 MB 512 MB
Core Speed 675 MHz 750 MHz
Memory Speed 3600 MHz 3600 MHz
Power (Max TDP) 150 watts 150 watts
Bandwidth 86400 MB/sec 115200 MB/sec
Texel Rate 37800 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 336 800(160x5)
Texture Mapping Units 56 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1950 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics 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 maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 460

Amazon.com

Check prices at:

Radeon HD 4870 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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