GeForce GT 440 3GB vs GeForce GTS 150

Intro

Compare all of that to the GeForce GTS 150, which makes use of a 55 nm design. nVidia has set the core frequency at 740 MHz. The GDDR3 memory is set to run at a frequency of 500 MHz on this model. It features 128 SPUs along with 64 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 GTS 150		141 Watts
	Difference: 85 Watts (152%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 440 3GB is 35% faster than the GeForce GTS 150 in general, because of its greater bandwidth. (explain)

GeForce GT 440 3GB		43200 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 11200 (35%)

Texel Rate

The GeForce GTS 150 should be quite a bit (more or less 232%) better at anisotropic filtering than the GeForce GT 440 3GB. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 33104 (232%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GT 440 3GB is the winner, but only just. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 2416 (20%)

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 maximum amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at 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 that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.