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GeForce GTX 460 2GB vs Radeon HD 7990

Intro

The GeForce GTX 460 2GB features a GPU clock speed of 675 MHz, and the 2048 MB of GDDR5 memory is set to run at 900 MHz through a 256-bit bus. It also is made up of 336 Stream Processors, 56 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 7990, which features GPU clock speed of 950 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 2GB 160 Watts
Radeon HD 7990 375 Watts
Difference: 215 Watts (134%)

Memory Bandwidth

Performance-wise, the Radeon HD 7990 should theoretically be much better than the GeForce GTX 460 2GB overall. (explain)

Radeon HD 7990 576000 MB/sec
GeForce GTX 460 2GB 115200 MB/sec
Difference: 460800 (400%)

Texel Rate

The Radeon HD 7990 will be much (about 543%) better at anisotropic filtering than the GeForce GTX 460 2GB. (explain)

Radeon HD 7990 243200 Mtexels/sec
GeForce GTX 460 2GB 37800 Mtexels/sec
Difference: 205400 (543%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7990 is superior to the GeForce GTX 460 2GB, and very much so. (explain)

Radeon HD 7990 60800 Mpixels/sec
GeForce GTX 460 2GB 21600 Mpixels/sec
Difference: 39200 (181%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 7990

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 7990
Manufacturer nVidia AMD
Year July 2010 April 2013
Code Name GF104 Malta
Memory 2048 MB 3072 MB (x2)
Core Speed 675 MHz 950 MHz (x2)
Memory Speed 3600 MHz 6000 MHz (x2)
Power (Max TDP) 160 watts 375 watts
Bandwidth 115200 MB/sec 576000 MB/sec
Texel Rate 37800 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 336 2048 (x2)
Texture Mapping Units 56 128 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit (x2)
Fab Process 40 nm 28 nm
Transistors 1950 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 460 2GB

Amazon.com

Check prices at:

Radeon HD 7990

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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