Geforce GTX 780 vs Radeon HD 6790

Intro

Compare all that to the Radeon HD 6790, which features a core clock frequency of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 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		10082 points
Radeon HD 6790		2150 points
	Difference: 7932 (369%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Geforce GTX 780		250 Watts
	Difference: 100 Watts (67%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 should perform much faster than the Radeon HD 6790 overall. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 153984 (115%)

Texel Rate

The Geforce GTX 780 should be much (about 393%) more effective at anisotropic filtering than the Radeon HD 6790. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 132096 (393%)

Pixel Rate

The Geforce GTX 780 should be much (about 208%) faster with regards to anti-aliasing than the Radeon HD 6790, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 27984 (208%)

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 data (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.