Radeon HD 5770 vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which has core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 720 SPUs along with 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 5770		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

The Radeon HD 5770 should theoretically be just a bit faster than the Radeon HD 6750 1GB overall. (explain)

Radeon HD 5770		76800 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The Radeon HD 5770 is a lot (about 30%) faster with regards to anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 7900 (30%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5770 is the winner, not by a very large margin though. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 2000 (17%)

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 (counted in megabytes per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.