Radeon HD 5770 vs Radeon HD 6970

Intro

Compare those specifications to the Radeon HD 6970, which uses a 40 nm design. AMD has clocked the core frequency at 880 MHz. The GDDR5 memory is set to run at a speed of 1375 MHz on this model. It features 1536 SPUs as well as 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

As far as performance goes, the Radeon HD 6970 should theoretically be a lot better 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 will be a lot (more or less 148%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6970 is the winner, by far. (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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated 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 drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.