Radeon HD 6450 (OEM) vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which has 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 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 6750		86 Watts
	Difference: 55 Watts (177%)

Memory Bandwidth

In theory, the Radeon HD 6750 will be 400% faster than the Radeon HD 6450 (OEM) in general, because of its higher data rate. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6750 is a lot (approximately 422%) better at AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 21100 (422%)

Pixel Rate

The Radeon HD 6750 should be much (more or less 364%) more effective at FSAA than the Radeon HD 6450 (OEM), and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 9100 (364%)

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 maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.