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GeForce GTX 460 2GB vs Radeon HD 4790

Intro

The GeForce GTX 460 2GB uses a 40 nm design. nVidia has set the core speed at 675 MHz. The GDDR5 memory is set to run at a frequency of 900 MHz on this specific model. It features 336 SPUs along with 56 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 4790, which has a core clock speed of 600 MHz and a GDDR5 memory frequency of 800 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 460 2GB will 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 quite a bit (approximately 97%) more effective at texture 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

The GeForce GTX 460 2GB is quite a bit (about 125%) more effective at AA than the Radeon HD 4790, and capable of handling higher screen resolutions better. (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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied 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 this number, the better the video 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 most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability 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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