Radeon HD 4730 vs Radeon HD 6750

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 4730		140 Watts
	Difference: 54 Watts (63%)

Memory Bandwidth

Performance-wise, the Radeon HD 6750 should in theory be a small bit superior to the Radeon HD 4730 overall. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The Radeon HD 6750 is a little bit (more or less 17%) better at texture filtering than the Radeon HD 4730. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 3700 (17%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6750 is superior to the Radeon HD 4730, by a large margin. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 6000 (107%)

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 (measured in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.