Radeon HD 3850 512MB vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which has core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. 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 3850 512MB		75 Watts
Radeon HD 6750		86 Watts
	Difference: 11 Watts (15%)

Memory Bandwidth

The Radeon HD 6750 should theoretically be much faster than the Radeon HD 3850 512MB in general. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 3850 512MB		52992 MB/sec
	Difference: 11008 (21%)

Texel Rate

The Radeon HD 6750 should be quite a bit (about 144%) better at anisotropic filtering than the Radeon HD 3850 512MB. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 3850 512MB		10688 Mtexels/sec
	Difference: 15412 (144%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6750 is a better choice, but it probably won't make a huge difference. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 3850 512MB		10688 Mpixels/sec
	Difference: 912 (9%)

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 information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.