Radeon HD 5450 vs Radeon HD 5830

Intro

Compare 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 RAM. It features 1120(224x5) SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 5830		175 Watts
	Difference: 156 Watts (821%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5830 should be a lot faster than the Radeon HD 5450 overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 115200 (900%)

Texel Rate

The Radeon HD 5830 is quite a bit (more or less 762%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 39600 (762%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5830 is a better choice, by a large margin. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 10200 (392%)

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 max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics 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 amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.