GeForce GTX 780 Ti vs Radeon HD 7790

Intro

Compare all of that to the Radeon HD 7790, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is comprised of 896 SPUs, 56 TAUs, 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 780 Ti		10900 points
Radeon HD 7790		4330 points
	Difference: 6570 (152%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 165 Watts (194%)

Memory Bandwidth

The GeForce GTX 780 Ti should theoretically perform a lot faster than the Radeon HD 7790 in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 240000 (250%)

Texel Rate

The GeForce GTX 780 Ti should be quite a bit (approximately 275%) more effective at anisotropic filtering than the Radeon HD 7790. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 154000 (275%)

Pixel Rate

The GeForce GTX 780 Ti is much (approximately 163%) more effective at AA than the Radeon HD 7790, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 26000 (163%)

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 max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.