Radeon HD 5750 512MB vs Radeon HD 6750 1GB

Intro

Compare all of that to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular model. It features 720 SPUs as well as 36 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the Radeon HD 5750 512MB should perform a bit faster than the Radeon HD 6750 1GB in general. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 6750 1GB will be just a bit (about 4%) faster with regards to AF than the Radeon HD 5750 512MB. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 900 (4%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6750 1GB is superior to the Radeon HD 5750 512MB, but it probably won't make a huge difference. (explain)

Radeon HD 6750 1GB		11600 Mpixels/sec
Radeon HD 5750 512MB		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 max amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling 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 write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the potential to reach the maximum fill rate.