Radeon HD 5850 vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which has a core clock frequency of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 720 SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 5850		151 Watts
	Difference: 65 Watts (76%)

Memory Bandwidth

The Radeon HD 5850, in theory, should perform much faster than the Radeon HD 6750 1GB overall. (explain)

Radeon HD 5850		128000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The Radeon HD 5850 is a lot (approximately 100%) faster with regards to anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 5850		52200 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 26100 (100%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5850 is the winner, by a large margin. (explain)

Radeon HD 5850		23200 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 11600 (100%)

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 megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units of the card by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.