Radeon HD 6750 1GB vs Radeon HD 6850

Intro

Compare that to the Radeon HD 6850, which features core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs as well as 48 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 6850		127 Watts
	Difference: 41 Watts (48%)

Memory Bandwidth

The Radeon HD 6850 should in theory be a lot faster than the Radeon HD 6750 1GB in general. (explain)

Radeon HD 6850		128000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The Radeon HD 6850 should be a lot (approximately 43%) faster with regards to texture filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 6850		37200 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 11100 (43%)

Pixel Rate

The Radeon HD 6850 is a lot (about 114%) faster with regards to FSAA than the Radeon HD 6750 1GB, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 13200 (114%)

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 (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.