GeForce GT 220 GDDR3 vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which comes with clock speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 memory. It features 1344 SPUs along with 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTX 870M		110 Watts
	Difference: 52 Watts (90%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 870M should theoretically be much better than the GeForce GT 220 GDDR3 overall. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 63616 (196%)

Texel Rate

The GeForce GTX 870M will be a lot (more or less 954%) faster with regards to texture filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 95392 (954%)

Pixel Rate

The GeForce GTX 870M is much (more or less 352%) faster with regards to full screen anti-aliasing than the GeForce GT 220 GDDR3, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 17584 (352%)

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 largest amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.