GeForce GT 440 3GB vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which comes with a clock frequency of 1058 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 TAUs, and 16 Raster Operation Units.

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

Performance-wise, the GeForce GTX 650 should theoretically be quite a bit superior to the GeForce GT 440 3GB overall. (explain)

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

Texel Rate

The GeForce GTX 650 will be much (approximately 137%) more effective at texture 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

If using a high resolution is important to you, then the GeForce GTX 650 is a better choice, but it probably won't make a huge difference. (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 largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.