Geforce GTX 680 vs Radeon HD 5830

Intro

Compare all of that to the Radeon HD 5830, which features core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1120(224x5) SPUs as well as 56 Texture Address Units and 16 Rasterization Operator 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

In theory, the Geforce GTX 680 will be 50% faster than the Radeon HD 5830 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Geforce GTX 680 is much (approximately 187%) more effective at texture 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 a lot (about 152%) more effective at full screen anti-aliasing than the Radeon HD 5830, and should be capable of handling higher screen 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 information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it 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 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 this number, the better the video 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 the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.