GeForce GT 440 3GB vs GeForce GTX 870M

Intro

Compare that to the GeForce GTX 870M, which has a clock frequency of 941 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 192-bit bus, and makes use of a 28 nm design. It is made up of 1344 SPUs, 112 TAUs, and 24 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
GeForce GTX 870M		110 Watts
	Difference: 54 Watts (96%)

Memory Bandwidth

In theory, the GeForce GTX 870M should be 122% faster than the GeForce GT 440 3GB overall, because of its higher data rate. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 52800 (122%)

Texel Rate

The GeForce GTX 870M is a lot (more or less 639%) faster with regards to anisotropic filtering than the GeForce GT 440 3GB. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 91136 (639%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 870M is the winner, and very much so. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GT 440 3GB		14256 Mpixels/sec
	Difference: 8328 (58%)

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 information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.