GeForce 830M vs GeForce GT 220 GDDR3

Intro

Compare those specifications to the GeForce GT 220 GDDR3, which makes use of a 40 nm design. nVidia has clocked the core speed at 625 MHz. The GDDR3 memory runs at a frequency of 1012 MHz on this particular card. It features 48 SPUs as well as 16 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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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

Performance-wise, the GeForce GT 220 GDDR3 should in theory be a lot superior to 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 much (about 65%) better at anisotropic 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

The GeForce 830M is a lot (about 65%) faster with regards to anti-aliasing than the GeForce GT 220 GDDR3, and will be capable of handling higher resolutions more effectively. (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 information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.