GeForce GT 220 GDDR3 vs GeForce GTX 870M

Intro

Compare that to the GeForce GTX 870M, which has GPU clock speed of 941 MHz, and 3072 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also is comprised of 1344 SPUs, 112 Texture Address Units, and 24 Raster Operation 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

Theoretically speaking, the GeForce GTX 870M will be 196% faster than the GeForce GT 220 GDDR3 in general, because of its higher bandwidth. (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 (approximately 954%) faster with regards to anisotropic 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

If using lots of anti-aliasing is important to you, then the GeForce GTX 870M is superior to the GeForce GT 220 GDDR3, by far. (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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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 output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.