Radeon HD 6750 vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which features core speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 memory. It features 800 SPUs as well as 40 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 6770		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

In theory, the Radeon HD 6770 should be 5% quicker than the Radeon HD 6750 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon HD 6770 is a lot (more or less 38%) faster with regards to anisotropic filtering than the Radeon HD 6750. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6770 is superior to the Radeon HD 6750, by a large margin. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon HD 6750		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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.