Radeon HD 4830 1GB vs Radeon HD 6970

Intro

Compare those specs to the Radeon HD 6970, which features core speeds of 880 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
Radeon HD 6970		250 Watts
	Difference: 155 Watts (163%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6970 should be much faster than the Radeon HD 4830 1GB overall. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 118400 (206%)

Texel Rate

The Radeon HD 6970 should be a lot (more or less 359%) better at AF than the Radeon HD 4830 1GB. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 66080 (359%)

Pixel Rate

The Radeon HD 6970 is quite a bit (more or less 206%) faster with regards to AA than the Radeon HD 4830 1GB, and also able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 18960 (206%)

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 largest amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better 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 number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.