GeForce GT 440 1.5GB vs Radeon HD 6950 2GB

Intro

Compare that to the Radeon HD 6950 2GB, which features clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 144 Watts (257%)

Memory Bandwidth

The Radeon HD 6950 2GB should in theory perform much faster than the GeForce GT 440 1.5GB in general. (explain)

Radeon HD 6950 2GB		160000 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 116800 (270%)

Texel Rate

The Radeon HD 6950 2GB should be much (approximately 394%) more effective at texture filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 56144 (394%)

Pixel Rate

The Radeon HD 6950 2GB is quite a bit (approximately 80%) faster with regards to FSAA than the GeForce GT 440 1.5GB, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 11344 (80%)

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 max amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.