Geforce GTX 680 vs Radeon HD 7790

Intro

Compare those specifications to the Radeon HD 7790, which comes with GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1500 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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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

In theory, the Geforce GTX 680 should be 100% quicker than the Radeon HD 7790 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The Geforce GTX 680 will be much (more or less 130%) better at AF than the Radeon HD 7790. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 680 is superior to the Radeon HD 7790, by far. (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

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.