Radeon HD 4830 1GB vs Radeon HD 5830

Intro

Compare those specifications to the Radeon HD 5830, which makes use of a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this specific model. It features 1120(224x5) SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
Radeon HD 5830		175 Watts
	Difference: 80 Watts (84%)

Memory Bandwidth

In theory, the Radeon HD 5830 should be 122% quicker than the Radeon HD 4830 1GB overall, due to its greater data rate. (explain)

Radeon HD 5830		128000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 70400 (122%)

Texel Rate

The Radeon HD 5830 should be quite a bit (about 143%) more effective at texture filtering than the Radeon HD 4830 1GB. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 26400 (143%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5830 is superior to the Radeon HD 4830 1GB, by a large margin. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 3600 (39%)

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 maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, 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 number of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card 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 colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.