GeForce 9800 GT 1GB vs Radeon HD 5830

Intro

Compare all of that to the Radeon HD 5830, which uses a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this model. It features 1120(224x5) SPUs along with 56 TAUs and 16 ROPs.

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

In theory, the Radeon HD 5830 should be 122% quicker 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 is a lot (more or less 33%) better at texture filtering 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 should be quite a bit (about 33%) more effective at full screen anti-aliasing than the GeForce 9800 GT 1GB, and also should be capable of handling higher screen 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: Bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 is calculated by multiplying the total texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.