GeForce GT 440 1.5GB vs Radeon HD 7950 3GB

Intro

Compare all of that to the Radeon HD 7950 3GB, which has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 144 Watts (257%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 3GB should perform a lot faster than the GeForce GT 440 1.5GB overall. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 196800 (456%)

Texel Rate

The Radeon HD 7950 3GB is much (about 529%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 75344 (529%)

Pixel Rate

The Radeon HD 7950 3GB should be quite a bit (about 80%) more effective at anti-aliasing than the GeForce GT 440 1.5GB, and will be capable of handling higher resolutions better. (explain)

Radeon HD 7950 3GB		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 (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.