GeForce GT 440 3GB vs Radeon HD 4850 2GB

Intro

Compare that to the Radeon HD 4850 2GB, which comes with a GPU core clock speed of 625 MHz, and 2048 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) 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 4850 2GB		110 Watts
	Difference: 54 Watts (96%)

Memory Bandwidth

The Radeon HD 4850 2GB, in theory, should perform quite a bit faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 4850 2GB		63552 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 20352 (47%)

Texel Rate

The Radeon HD 4850 2GB should be a lot (about 75%) faster with regards to anisotropic filtering than the GeForce GT 440 3GB. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 10744 (75%)

Pixel Rate

The GeForce GT 440 3GB will be a lot (more or less 43%) better at AA than the Radeon HD 4850 2GB, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 4256 (43%)

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 information (measured in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.