GeForce GTS 450 1GB vs Radeon HD 5830

Intro

Compare those specs to the Radeon HD 5830, which comes with a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 256-bit bus. It also features 1120(224x5) Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon HD 5830		175 Watts
	Difference: 69 Watts (65%)

Memory Bandwidth

In theory, the Radeon HD 5830 is 122% faster than the GeForce GTS 450 1GB overall, because of its greater data rate. (explain)

Radeon HD 5830		128000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 70272 (122%)

Texel Rate

The Radeon HD 5830 will be much (about 79%) better at texture filtering than the GeForce GTS 450 1GB. (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 19744 (79%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5830 is the winner, though not by far. (explain)

Radeon HD 5830		12800 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 272 (2%)

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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.