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GeForce GTX 460 2GB vs Radeon HD 4790

Intro

The GeForce GTX 460 2GB has clock speeds of 675 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR5 memory. It features 336 SPUs as well as 56 TAUs and 32 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4790, which makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The GDDR5 memory works at a speed of 800 MHz on this particular card. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 460 2GB should be 13% faster than the Radeon HD 4790 overall, due to its higher data rate. (explain)

GeForce GTX 460 2GB 115200 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 12800 (13%)

Texel Rate

The GeForce GTX 460 2GB should be much (approximately 97%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

GeForce GTX 460 2GB 37800 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 18600 (97%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 460 2GB is the winner, by far. (explain)

GeForce GTX 460 2GB 21600 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 12000 (125%)

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 4790

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 4790
Manufacturer nVidia AMD
Year July 2010 2009
Code Name GF104 RV790
Memory 2048 MB 512 MB
Core Speed 675 MHz 600 MHz
Memory Speed 3600 MHz 3200 MHz
Power (Max TDP) 160 watts (Unknown) watts
Bandwidth 115200 MB/sec 102400 MB/sec
Texel Rate 37800 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 9600 Mpixels/sec
Unified Shaders 336 640(128x5)
Texture Mapping Units 56 32
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 maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 4790

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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