GeForce GT 440 3GB vs Radeon HD 6790

Intro

Compare those specs to the Radeon HD 6790, which features clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
Radeon HD 6790		150 Watts
	Difference: 94 Watts (168%)

Memory Bandwidth

The Radeon HD 6790 should in theory perform much faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 91200 (211%)

Texel Rate

The Radeon HD 6790 is much (approximately 136%) more effective at anisotropic filtering than the GeForce GT 440 3GB. (explain)

Radeon HD 6790		33600 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 19344 (136%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GT 440 3GB is superior to the Radeon HD 6790, though not by far. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 816 (6%)

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 (counted in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs 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 rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.