Radeon HD 4350 vs Radeon HD 6750

Intro

Compare those specs 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 frequency of 1000 MHz on this card. 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

Power Consumption (Max TDP)

Radeon HD 4350		22 Watts
Radeon HD 6750		86 Watts
	Difference: 64 Watts (291%)

Memory Bandwidth

The Radeon HD 6750, in theory, should be quite a bit faster than the Radeon HD 4350 overall. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 56000 (700%)

Texel Rate

The Radeon HD 6750 will be much (approximately 467%) more effective at anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 21500 (467%)

Pixel Rate

The Radeon HD 6750 should be quite a bit (about 404%) faster with regards to anti-aliasing than the Radeon HD 4350, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 9300 (404%)

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 largest amount of information (counted in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour 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 also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.