Radeon HD 5750 512MB vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which comes with clock 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 Texture Address Units and 16 Rasterization Operator Units.

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 will be 15% quicker than the Radeon HD 6750 overall, due to its higher bandwidth. (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 just a bit (about 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 (more or less 4%) better at anti-aliasing than the Radeon HD 5750 512MB, and able to handle higher resolutions better. (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: Bandwidth is the max amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on 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 reach the maximum fill rate.