GeForce GT 440 3GB vs Radeon HD 4850 512MB

Intro

Compare all that to the Radeon HD 4850 512MB, which has clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units 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 512MB		110 Watts
	Difference: 54 Watts (96%)

Memory Bandwidth

In theory, the Radeon HD 4850 512MB should be quite a bit faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 4850 512MB		63552 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 20352 (47%)

Texel Rate

The Radeon HD 4850 512MB should be quite a bit (about 75%) faster with regards to anisotropic filtering than the GeForce GT 440 3GB. (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 10744 (75%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GT 440 3GB is the winner, by far. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 4850 512MB		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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.