Radeon HD 6750 vs Radeon HD 6950

Intro

Compare those specs to the Radeon HD 6950, which features core speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 6950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 should perform much faster than the Radeon HD 6750 overall. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 should be a lot (approximately 170%) better at AF than the Radeon HD 6750. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 44300 (170%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6950 is the winner, by far. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 14000 (121%)

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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video 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 number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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.