GeForce GT 220 GDDR3 vs GeForce GTS 450

Intro

Compare that to the GeForce GTS 450, which makes use of a 40 nm design. nVidia has set the core speed at 783 MHz. The GDDR5 memory runs at a frequency of 902 MHz on this specific model. It features 192 SPUs along with 32 Texture Address Units and 16 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 GTS 450		106 Watts
	Difference: 48 Watts (83%)

Memory Bandwidth

Theoretically, the GeForce GTS 450 should perform quite a bit faster than the GeForce GT 220 GDDR3 in general. (explain)

GeForce GTS 450		57728 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 25344 (78%)

Texel Rate

The GeForce GTS 450 should be a lot (more or less 151%) more effective at texture filtering than the GeForce GT 220 GDDR3. (explain)

GeForce GTS 450		25056 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 15056 (151%)

Pixel Rate

The GeForce GTS 450 should be quite a bit (about 151%) more effective at FSAA than the GeForce GT 220 GDDR3, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 7528 (151%)

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 (measured in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.