Radeon HD 5750 1GB vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which comes with a GPU core clock speed of 900 MHz, and 512 MB of GDDR5 RAM set to run at 1050 MHz through a 128-bit bus. It also is comprised of 800 SPUs, 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 5750 1GB		86 Watts
Radeon HD 6770		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

The Radeon HD 5750 1GB, in theory, should perform a small bit faster than the Radeon HD 6770 in general. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 6400 (10%)

Texel Rate

The Radeon HD 6770 is a lot (about 43%) faster with regards to texture filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 10800 (43%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6770 is superior to the Radeon HD 5750 1GB, by far. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 3200 (29%)

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 data (counted in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher 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 most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.