GeForce 9800 GT 1GB vs Radeon HD 5830

Intro

Compare all that to the Radeon HD 5830, which features 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)

GeForce 9800 GT 1GB		105 Watts
Radeon HD 5830		175 Watts
	Difference: 70 Watts (67%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 will be 122% faster than the GeForce 9800 GT 1GB in general, due to its higher data rate. (explain)

Radeon HD 5830		128000 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 70400 (122%)

Texel Rate

The Radeon HD 5830 will be quite a bit (more or less 33%) faster with regards to AF than the GeForce 9800 GT 1GB. (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 11200 (33%)

Pixel Rate

The Radeon HD 5830 will be much (more or less 33%) faster with regards to AA than the GeForce 9800 GT 1GB, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 5830		12800 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 3200 (33%)

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 largest amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.