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Geforce GTX 680 vs Radeon HD 7790

Intro

The Geforce GTX 680 features a core clock speed of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 7790, which comes with a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 680 7650 points
Radeon HD 7790 4330 points
Difference: 3320 (77%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Geforce GTX 680 195 Watts
Difference: 110 Watts (129%)

Memory Bandwidth

Theoretically, the Geforce GTX 680 should be much faster than the Radeon HD 7790 overall. (explain)

Geforce GTX 680 192256 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 96256 (100%)

Texel Rate

The Geforce GTX 680 should be quite a bit (approximately 130%) better at texture filtering than the Radeon HD 7790. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 72768 (130%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 680 is a better choice, by a large margin. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 16192 (101%)

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 680

Amazon.com

Check prices at:

Radeon HD 7790

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 680 Radeon HD 7790
Manufacturer nVidia AMD
Year March 2012 March 2013
Code Name GK104 Bonaire XT
Memory 2048 MB 1024 MB
Core Speed 1006 MHz 1000 MHz
Memory Speed 6008 MHz 6000 MHz
Power (Max TDP) 195 watts 85 watts
Bandwidth 192256 MB/sec 96000 MB/sec
Texel Rate 128768 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1536 896
Texture Mapping Units 128 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 number of pixels the video 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 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Geforce GTX 680

Amazon.com

Check prices at:

Radeon HD 7790

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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