GeForce GT 220 GDDR3 vs GeForce GTX 870M

Intro

Compare that to the GeForce GTX 870M, which makes use of a 28 nm design. nVidia has set the core speed at 941 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this particular model. It features 1344 SPUs as well as 112 Texture Address Units and 24 ROPs.

Display Graphs

Hide Graphs

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 should be 196% faster than the GeForce GT 220 GDDR3 overall, because of its greater data rate. (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 (about 954%) more effective at AF 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 should be a lot (more or less 352%) more effective at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be able to handle higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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