GeForce GT 450 (OEM) vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which uses a 28 nm design. nVidia has set the core frequency at 941 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific card. It features 1344 SPUs as well as 112 TAUs and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
GeForce GTX 870M		110 Watts
	Difference: 4 Watts (4%)

Memory Bandwidth

Both cards have the exact same bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The GeForce GTX 870M will be a lot (approximately 456%) faster with regards to anisotropic filtering than the GeForce GT 450 (OEM). (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 86432 (456%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 870M is the winner, but only just. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 3624 (19%)

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 MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at 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 that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.