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GeForce GTX 460 1GB vs Radeon HD 4890 2GB

Intro

The GeForce GTX 460 1GB has a GPU clock speed of 675 MHz, and the 1024 MB of GDDR5 memory runs at 900 MHz through a 256-bit bus. It also is made up of 336 SPUs, 56 TAUs, and 32 ROPs.

Compare those specifications to the Radeon HD 4890 2GB, which comes with a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 975 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB 160 Watts
Radeon HD 4890 2GB 190 Watts
Difference: 30 Watts (19%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4890 2GB should theoretically be a bit better than the GeForce GTX 460 1GB in general. (explain)

Radeon HD 4890 2GB 124800 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 9600 (8%)

Texel Rate

The Radeon HD 4890 2GB will be a small bit (approximately 6%) more effective at anisotropic filtering than the GeForce GTX 460 1GB. (explain)

Radeon HD 4890 2GB 40000 Mtexels/sec
GeForce GTX 460 1GB 37800 Mtexels/sec
Difference: 2200 (6%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 460 1GB is superior to the Radeon HD 4890 2GB, and very much so. (explain)

GeForce GTX 460 1GB 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 1GB

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

Display Specifications

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Model GeForce GTX 460 1GB Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year July 2010 Apr 2, 2009
Code Name GF104 RV790 XT
Memory 1024 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 (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 are applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines 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 1GB

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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