Radeon HD 6750 1GB vs Radeon HD 6970

Intro

Compare all that to the Radeon HD 6970, which has GPU clock speed of 880 MHz, and 2048 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 6970		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

In theory, the Radeon HD 6970 should be quite a bit faster than the Radeon HD 6750 1GB overall. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 112000 (175%)

Texel Rate

The Radeon HD 6970 will be much (more or less 224%) more effective at AF than the Radeon HD 6750 1GB. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 58380 (224%)

Pixel Rate

The Radeon HD 6970 is much (approximately 143%) more effective at full screen anti-aliasing than the Radeon HD 6750 1GB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 16560 (143%)

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 (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the 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 maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.