GeForce 8800 GTS (G80) 320MB vs Radeon HD 7790

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 58 Watts (68%)

Memory Bandwidth

In theory, the Radeon HD 7790 should be much faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon HD 7790		96000 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 32640 (52%)

Texel Rate

The Radeon HD 7790 is a lot (more or less 127%) more effective at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 7790		56000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
	Difference: 31376 (127%)

Pixel Rate

The Radeon HD 7790 should be quite a bit (more or less 56%) faster with regards to anti-aliasing than the GeForce 8800 GTS (G80) 320MB, and also should be capable of handling higher resolutions better. (explain)

Radeon HD 7790		16000 Mpixels/sec
GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
	Difference: 5740 (56%)

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 (measured in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.