GeForce 830M vs GeForce GT 220 GDDR3

Intro

Compare that to the GeForce GT 220 GDDR3, which has core clock speeds of 625 MHz on the GPU, and 1012 MHz on the 512 MB of GDDR3 RAM. It features 48 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

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

Performance-wise, the GeForce GT 220 GDDR3 should theoretically be quite a bit better than the GeForce 830M in general. (explain)

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

Texel Rate

The GeForce 830M is much (about 65%) better 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

The GeForce 830M is much (about 65%) better at FSAA than the GeForce GT 220 GDDR3, and also able to handle higher screen resolutions without losing too much performance. (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 maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.