Radeon HD 5770 vs Radeon HD 6970

Intro

Compare those specifications to the Radeon HD 6970, which comes with GPU core speed of 880 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 96 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon HD 6970		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

The Radeon HD 6970, in theory, should be much faster than the Radeon HD 5770 in general. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 99200 (129%)

Texel Rate

The Radeon HD 6970 should be quite a bit (approximately 148%) faster with regards to texture filtering than the Radeon HD 5770. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 50480 (148%)

Pixel Rate

The Radeon HD 6970 should be quite a bit (more or less 107%) more effective at anti-aliasing than the Radeon HD 5770, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 14560 (107%)

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 data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 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 number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.