Radeon HD 5750 512MB vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which features core speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. 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

In theory, the Radeon HD 5750 512MB should be 15% faster than the Radeon HD 6750 in general, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 6750 will be a bit (approximately 4%) better at AF than the Radeon HD 5750 512MB. (explain)

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

Pixel Rate

The Radeon HD 6750 will be a little bit (about 4%) faster with regards to anti-aliasing than the Radeon HD 5750 512MB, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6750		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 largest amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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