GeForce GT 440 3GB vs Radeon HD 3690/3830

Intro

Compare those specs to the Radeon HD 3690/3830, which has core clock speeds of 668 MHz on the GPU, and 828 MHz on the 256 MB of GDDR3 RAM. It features 320(64x5) SPUs as well as 16 TAUs 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 3690/3830		75 Watts
	Difference: 19 Watts (34%)

Memory Bandwidth

In theory, the GeForce GT 440 3GB should be 63% faster than the Radeon HD 3690/3830 overall, due to its higher data rate. (explain)

GeForce GT 440 3GB		43200 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 16704 (63%)

Texel Rate

The GeForce GT 440 3GB will be much (approximately 33%) better at anisotropic filtering than the Radeon HD 3690/3830. (explain)

GeForce GT 440 3GB		14256 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 3568 (33%)

Pixel Rate

The GeForce GT 440 3GB is quite a bit (about 33%) better at full screen anti-aliasing than the Radeon HD 3690/3830, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 3568 (33%)

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 (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.