Radeon HD 5770 vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which comes with core speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. It features 720 SPUs along with 36 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

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

Texel Rate

The Radeon HD 5770 is much (about 30%) better at anisotropic filtering than the Radeon HD 6750. (explain)

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

Pixel Rate

The Radeon HD 5770 is just a bit (about 17%) more effective at full screen anti-aliasing than the Radeon HD 6750, and should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon HD 6750		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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This 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 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 write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.