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GeForce GTX 460 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 460 makes use of a 40 nm design. nVidia has clocked the core frequency at 675 MHz. The GDDR5 RAM runs at a speed of 900 MHz on this card. It features 336 SPUs along with 56 Texture Address Units and 24 ROPs.

Compare all of that to the Radeon HD 4890 1GB, which uses a 55 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory runs at a frequency of 975 MHz on this specific card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 150 Watts
Radeon HD 4890 1GB 190 Watts
Difference: 40 Watts (27%)

Memory Bandwidth

In theory, the Radeon HD 4890 1GB should perform a lot faster than the GeForce GTX 460 overall. (explain)

Radeon HD 4890 1GB 124800 MB/sec
GeForce GTX 460 86400 MB/sec
Difference: 38400 (44%)

Texel Rate

The Radeon HD 4890 1GB will be a little bit (about 6%) better at AF than the GeForce GTX 460. (explain)

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

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 460 is the winner, but only just. (explain)

GeForce GTX 460 16200 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 200 (1%)

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

Amazon.com

Check prices at:

Radeon HD 4890 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 Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year July 2010 Apr 2, 2009
Code Name GF104 RV790 XT
Memory 768 MB 1024 MB
Core Speed 675 MHz 1000 MHz
Memory Speed 3600 MHz 3900 MHz
Power (Max TDP) 150 watts 190 watts
Bandwidth 86400 MB/sec 124800 MB/sec
Texel Rate 37800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 16000 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 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 max amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 460

Amazon.com

Check prices at:

Radeon HD 4890 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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