Radeon HD 6750 1GB vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which features GPU clock speed of 900 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6770 1GB should in theory be just a bit superior to the Radeon HD 6750 1GB in general. (explain)

Radeon HD 6770 1GB		67200 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 3200 (5%)

Texel Rate

The Radeon HD 6770 1GB should be quite a bit (more or less 38%) more effective at AF than the Radeon HD 6750 1GB. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 9900 (38%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6770 1GB is a better choice, and very much so. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 2800 (24%)

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 largest amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.