GeForce GTX 285 2GB vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this card. It features 1120(224x5) SPUs along with 56 TAUs 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 285 2GB		204 Watts
	Difference: 29 Watts (17%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 2GB is 24% quicker than the Radeon HD 5830 in general, due to its greater data rate. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon HD 5830		128000 MB/sec
	Difference: 30976 (24%)

Texel Rate

The GeForce GTX 285 2GB should be a small bit (approximately 16%) better at AF than the Radeon HD 5830. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 7040 (16%)

Pixel Rate

The GeForce GTX 285 2GB will be much (more or less 62%) better at AA than the Radeon HD 5830, and capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 7936 (62%)

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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.