GeForce GT 340 1GB vs GeForce GT 440 1.5GB

Intro

Compare those specifications to the GeForce GT 440 1.5GB, which uses a 40 nm design. nVidia has clocked the core speed at 594 MHz. The GDDR3 RAM is set to run at a frequency of 900 MHz on this model. It features 144 SPUs as well as 24 Texture Address Units and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
GeForce GT 340 1GB		69 Watts
	Difference: 13 Watts (23%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 340 1GB will be 26% quicker than the GeForce GT 440 1.5GB overall, due to its greater bandwidth. (explain)

GeForce GT 340 1GB		54400 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 11200 (26%)

Texel Rate

The GeForce GT 340 1GB should be a lot (approximately 23%) faster with regards to AF than the GeForce GT 440 1.5GB. (explain)

GeForce GT 340 1GB		17600 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 3344 (23%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GT 440 1.5GB is a better choice, by far. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 9856 (224%)

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 across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many 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.