GeForce GT 220 GDDR3 vs GeForce GTX 460 2GB

Intro

Compare all that to the GeForce GTX 460 2GB, which features clock speeds of 675 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR5 RAM. It features 336 SPUs along with 56 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 102 Watts (176%)

Memory Bandwidth

Performance-wise, the GeForce GTX 460 2GB should in theory be much better than the GeForce GT 220 GDDR3 overall. (explain)

GeForce GTX 460 2GB		115200 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 82816 (256%)

Texel Rate

The GeForce GTX 460 2GB should be quite a bit (about 278%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 27800 (278%)

Pixel Rate

The GeForce GTX 460 2GB should be much (more or less 332%) more effective at anti-aliasing than the GeForce GT 220 GDDR3, and should be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 460 2GB		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 information (in units of megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core 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 in a second.

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