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GeForce GTX 460 2GB vs Radeon HD 4890 2GB

Intro

The GeForce GTX 460 2GB uses a 40 nm design. nVidia has set the core speed at 675 MHz. The GDDR5 memory runs at a speed of 900 MHz on this model. It features 336 SPUs as well as 56 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 4890 2GB, which features GPU core speed of 1000 MHz, and 2048 MB of GDDR5 memory set to run at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 2GB 160 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 30 Watts (19%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4890 2GB should perform a little bit faster than the GeForce GTX 460 2GB in general. (explain)

Radeon HD 4890 2GB 124800 MB/sec
GeForce GTX 460 2GB 115200 MB/sec
Difference: 9600 (8%)

Texel Rate

The Radeon HD 4890 2GB is a little bit (more or less 6%) faster with regards to AF than the GeForce GTX 460 2GB. (explain)

Radeon HD 4890 2GB 40000 Mtexels/sec
GeForce GTX 460 2GB 37800 Mtexels/sec
Difference: 2200 (6%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 460 2GB is superior to the Radeon HD 4890 2GB, by far. (explain)

GeForce GTX 460 2GB 21600 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 5600 (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

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GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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 4890 2GB
Manufacturer nVidia AMD
Year July 2010 Apr 2, 2009
Code Name GF104 RV790 XT
Memory 2048 MB 2048 MB
Core Speed 675 MHz 1000 MHz
Memory Speed 3600 MHz 3900 MHz
Power (Max TDP) 160 watts 190 watts
Bandwidth 115200 MB/sec 124800 MB/sec
Texel Rate 37800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 16000 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 959 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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved over 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 memory, it must be multiplied by 2 once 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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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