Geforce GTX 680 vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which features a clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 1120(224x5) SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5830		175 Watts
Geforce GTX 680		195 Watts
	Difference: 20 Watts (11%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 is 50% quicker than the Radeon HD 5830 overall, because of its greater data rate. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 5830		128000 MB/sec
	Difference: 64256 (50%)

Texel Rate

The Geforce GTX 680 should be a lot (about 187%) more effective at anisotropic filtering than the Radeon HD 5830. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 83968 (187%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 680 is superior to the Radeon HD 5830, by a large margin. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 19392 (152%)

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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 applied in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can 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 card's 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 - the lower the bandwidth is, the lower the potential to get to the max fill rate.