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GeForce GTX 460 2GB vs Radeon HD 4870 1GB

Intro

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

Compare that to the Radeon HD 4870 1GB, which makes use of a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM runs at a speed of 900 MHz on this specific model. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB 150 Watts
GeForce GTX 460 2GB 160 Watts
Difference: 10 Watts (7%)

Memory Bandwidth

Both cards have the exact same bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The GeForce GTX 460 2GB will be quite a bit (more or less 26%) faster with regards to AF than the Radeon HD 4870 1GB. (explain)

GeForce GTX 460 2GB 37800 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 7800 (26%)

Pixel Rate

The GeForce GTX 460 2GB should be quite a bit (approximately 80%) faster with regards to FSAA than the Radeon HD 4870 1GB, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 460 2GB 21600 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 9600 (80%)

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 4870 1GB

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 4870 1GB
Manufacturer nVidia AMD
Year July 2010 Jun 25, 2008
Code Name GF104 RV770 XT
Memory 2048 MB 1024 MB
Core Speed 675 MHz 750 MHz
Memory Speed 3600 MHz 3600 MHz
Power (Max TDP) 160 watts 150 watts
Bandwidth 115200 MB/sec 115200 MB/sec
Texel Rate 37800 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 336 800(160x5)
Texture Mapping Units 56 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-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 max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at 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 record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 4870 1GB

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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