GeForce GT 420 vs GeForce GT 440 3GB

Intro

Compare those specs to the GeForce GT 440 3GB, which comes with a clock speed of 594 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 192-bit bus, and makes use of a 40 nm design. It is made up of 144 SPUs, 24 TAUs, and 24 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
GeForce GT 440 3GB		56 Watts
	Difference: 6 Watts (12%)

Memory Bandwidth

The GeForce GT 440 3GB should theoretically perform much faster than the GeForce GT 420 overall. (explain)

GeForce GT 440 3GB		43200 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 14400 (50%)

Texel Rate

The GeForce GT 440 3GB will be quite a bit (approximately 155%) better at anisotropic filtering than the GeForce GT 420. (explain)

GeForce GT 440 3GB		14256 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 8656 (155%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GT 440 3GB is superior to the GeForce GT 420, and very much so. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 11456 (409%)

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 (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.