GeForce GT 440 3GB vs Radeon HD 6790

Intro

Compare those specifications to the Radeon HD 6790, which features GPU clock speed of 840 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 256-bit bus. It also is made up of 800 Stream Processors, 40 TAUs, and 16 ROPs.

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

Theoretically speaking, the Radeon HD 6790 will be 211% quicker than the GeForce GT 440 3GB overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 6790 will be much (about 136%) better 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 using a high screen resolution is important to you, then the GeForce GT 440 3GB is superior to the Radeon HD 6790, but 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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.