GeForce GT 220 GDDR3 vs GeForce GTS 450 1GB

Intro

Compare all that to the GeForce GTS 450 1GB, which uses a 40 nm design. nVidia has clocked the core speed at 783 MHz. The GDDR5 memory works at a speed of 902 MHz on this card. It features 192 SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 48 Watts (83%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 1GB is 78% quicker than the GeForce GT 220 GDDR3 overall, because of its higher data rate. (explain)

GeForce GTS 450 1GB		57728 MB/sec
GeForce GT 220 GDDR3		32384 MB/sec
	Difference: 25344 (78%)

Texel Rate

The GeForce GTS 450 1GB should be quite a bit (about 151%) faster with regards to AF than the GeForce GT 220 GDDR3. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 15056 (151%)

Pixel Rate

The GeForce GTS 450 1GB is quite a bit (more or less 151%) more effective at anti-aliasing than the GeForce GT 220 GDDR3, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 450 1GB		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 information (measured in MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 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.