Radeon HD 5750 1GB vs Radeon HD 6750 1GB

Intro

Compare those specifications to the Radeon HD 6750 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific model. It features 720 SPUs as well as 36 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Radeon HD 5750 1GB should be 15% faster than the Radeon HD 6750 1GB overall, because of its greater bandwidth. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 6750 1GB should be a small bit (about 4%) better at AF than the Radeon HD 5750 1GB. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 900 (4%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6750 1GB is superior to the Radeon HD 5750 1GB, though only just barely. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 400 (4%)

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 transferred across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, 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 most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.