Radeon HD 6750 1GB vs Radeon HD 6970

Intro

Compare that to the Radeon HD 6970, which comes with a GPU core clock speed of 880 MHz, and 2048 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 Texture Address Units, 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 175% faster than the Radeon HD 6750 1GB overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon HD 6970 should be quite a bit (approximately 224%) faster with regards to texture filtering 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

If running with lots of anti-aliasing is important to you, then the Radeon HD 6970 is superior to the Radeon HD 6750 1GB, and very much so. (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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher 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 amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.