GeForce 830M vs GeForce GT 220 GDDR3

Intro

Compare all of that to the GeForce GT 220 GDDR3, which uses a 40 nm design. nVidia has clocked the core speed at 625 MHz. The GDDR3 memory runs at a speed of 1012 MHz on this specific model. It features 48 SPUs along with 16 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 33 Watts (132%)

Memory Bandwidth

The GeForce GT 220 GDDR3, in theory, should perform much faster than the GeForce 830M overall. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 17984 (125%)

Texel Rate

The GeForce 830M should be quite a bit (more or less 65%) more effective at texture filtering than the GeForce GT 220 GDDR3. (explain)

GeForce 830M		16464 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 6464 (65%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce 830M is superior to the GeForce GT 220 GDDR3, by far. (explain)

GeForce 830M		8232 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 3232 (65%)

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 data (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 - the lower the bandwidth is, the lower the potential to reach the max fill rate.