GeForce GT 440 3GB vs GeForce GTX 870M

Intro

Compare those specifications to the GeForce GTX 870M, which comes with a GPU core clock speed of 941 MHz, and 3072 MB of GDDR5 memory running at 1000 MHz through a 192-bit bus. It also features 1344 SPUs, 112 Texture Address Units, 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

The GeForce GTX 870M, in theory, should be much faster than the GeForce GT 440 3GB overall. (explain)

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

Texel Rate

The GeForce GTX 870M will be quite a bit (about 639%) faster with regards to AF 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

The GeForce GTX 870M is a lot (approximately 58%) faster with regards to FSAA than the GeForce GT 440 3GB, and will be able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.