GeForce GT 440 3GB vs GeForce GTX 650

Intro

Compare those specs to the GeForce GTX 650, which features a clock speed of 1058 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

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 will be 85% faster than the GeForce GT 440 3GB overall, 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 is 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

The GeForce GTX 650 is a little bit (about 19%) more effective at AA than the GeForce GT 440 3GB, and also should be capable of handling higher screen resolutions without losing too much performance. (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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.