GeForce GT 220 GDDR3 vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which comes with a clock frequency of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTX 880M		130 Watts
	Difference: 72 Watts (124%)

Memory Bandwidth

In theory, the GeForce GTX 880M is 295% faster than the GeForce GT 220 GDDR3 overall, because of its greater data rate. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 95616 (295%)

Texel Rate

The GeForce GTX 880M should be a lot (about 1121%) better at AF than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 112112 (1121%)

Pixel Rate

The GeForce GTX 880M should be quite a bit (more or less 511%) faster with regards to anti-aliasing than the GeForce GT 220 GDDR3, and able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 25528 (511%)

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 megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 maximum fill rate.