Radeon HD 4830 512MB vs Radeon HD 5670

Intro

Compare all that to the Radeon HD 5670, which has core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 34 Watts (56%)

Memory Bandwidth

The Radeon HD 5670 should in theory be a bit faster than the Radeon HD 4830 512MB overall. (explain)

Radeon HD 5670		64000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The Radeon HD 4830 512MB should be a small bit (more or less 19%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 4830 512MB		18400 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 2900 (19%)

Pixel Rate

The Radeon HD 4830 512MB will be a lot (more or less 48%) better at AA than the Radeon HD 5670, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4830 512MB		9200 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 3000 (48%)

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 data (counted in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. 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 is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.