GeForce GT 220 GDDR3 vs GeForce GTX 550 Ti

Intro

Compare all that to the GeForce GTX 550 Ti, which comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also features a 192-bit bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 Texture Address Units, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 58 Watts (100%)

Memory Bandwidth

Performance-wise, the GeForce GTX 550 Ti should theoretically be much superior to the GeForce GT 220 GDDR3 overall. (explain)

GeForce GTX 550 Ti		98496 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 66112 (204%)

Texel Rate

The GeForce GTX 550 Ti is quite a bit (more or less 188%) faster with regards to AF than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 18800 (188%)

Pixel Rate

The GeForce GTX 550 Ti will be quite a bit (more or less 332%) faster with regards to full screen anti-aliasing than the GeForce GT 220 GDDR3, and will be capable of handling higher resolutions better. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 16600 (332%)

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 (counted in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 are processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.