GeForce GT 440 3GB vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which has clock speeds of 1058 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs along with 32 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
GeForce GTX 650		64 Watts
	Difference: 8 Watts (14%)

Memory Bandwidth

In theory, the GeForce GTX 650 is 85% faster than the GeForce GT 440 3GB in general, due to its higher data rate. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 36800 (85%)

Texel Rate

The GeForce GTX 650 should be quite a bit (approximately 137%) better at anisotropic filtering than the GeForce GT 440 3GB. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 19600 (137%)

Pixel Rate

The GeForce GTX 650 is a little bit (about 19%) faster with regards to full screen anti-aliasing than the GeForce GT 440 3GB, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GT 440 3GB		14256 Mpixels/sec
	Difference: 2672 (19%)

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 megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.