GeForce GT 220 GDDR3 vs GeForce GT 450 (OEM)

Intro

Compare those specifications to the GeForce GT 450 (OEM), which has core speeds of 790 MHz on the GPU, and 1000 MHz on the 1536 MB of GDDR5 memory. It features 144 SPUs as well as 24 Texture Address Units and 24 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 GT 450 (OEM)		106 Watts
	Difference: 48 Watts (83%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) is 196% quicker than the GeForce GT 220 GDDR3 overall, due to its higher bandwidth. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 63616 (196%)

Texel Rate

The GeForce GT 450 (OEM) will be much (more or less 90%) faster with regards to AF than the GeForce GT 220 GDDR3. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 8960 (90%)

Pixel Rate

The GeForce GT 450 (OEM) is quite a bit (approximately 279%) better at full screen anti-aliasing than the GeForce GT 220 GDDR3, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 13960 (279%)

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 max amount of information (measured in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are 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 better 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.