Geforce GTX 680 vs Radeon HD 5830

Intro

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

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 will be 50% faster than the Radeon HD 5830 overall, because of its higher 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 quite a bit (approximately 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

The Geforce GTX 680 will be much (approximately 152%) better at full screen anti-aliasing than the Radeon HD 5830, and should be capable of handling higher resolutions better. (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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 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 speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.