GeForce 9800 GT 1GB vs GeForce GT 220 GDDR3

Intro

Compare that to the GeForce GT 220 GDDR3, which comes with GPU clock speed of 625 MHz, and 512 MB of GDDR3 RAM running at 1012 MHz through a 128-bit bus. It also features 48 Stream Processors, 16 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce 9800 GT 1GB		105 Watts
	Difference: 47 Watts (81%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GT 1GB should in theory be quite a bit better than the GeForce GT 220 GDDR3 in general. (explain)

GeForce 9800 GT 1GB		57600 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 25216 (78%)

Texel Rate

The GeForce 9800 GT 1GB will be a lot (approximately 236%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 23600 (236%)

Pixel Rate

The GeForce 9800 GT 1GB should be a lot (more or less 92%) faster with regards to anti-aliasing than the GeForce GT 220 GDDR3, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 4600 (92%)

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 maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.