Radeon HD 6750 vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which comes with a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 256-bit bus. It also is comprised of 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 6870		151 Watts
	Difference: 65 Watts (76%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6870 should be a lot faster than the Radeon HD 6750 in general. (explain)

Radeon HD 6870		134400 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 70400 (110%)

Texel Rate

The Radeon HD 6870 should be much (about 93%) better at anisotropic filtering than the Radeon HD 6750. (explain)

Radeon HD 6870		50400 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 24300 (93%)

Pixel Rate

The Radeon HD 6870 will be quite a bit (about 148%) more effective at anti-aliasing than the Radeon HD 6750, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6870		28800 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 17200 (148%)

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 data (in units of MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one 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 worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.