GeForce GT 220 GDDR3 vs Radeon HD 5450

Intro

Compare all that to the Radeon HD 5450, which comes with GPU core speed of 650 MHz, and 512 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 39 Watts (205%)

Memory Bandwidth

The GeForce GT 220 GDDR3 should in theory be a lot faster than the Radeon HD 5450 in general. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 19584 (153%)

Texel Rate

The GeForce GT 220 GDDR3 should be a lot (approximately 92%) faster with regards to AF than the Radeon HD 5450. (explain)

GeForce GT 220 GDDR3		10000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 4800 (92%)

Pixel Rate

The GeForce GT 220 GDDR3 should be quite a bit (approximately 92%) faster with regards to full screen anti-aliasing than the Radeon HD 5450, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce GT 220 GDDR3		5000 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 2400 (92%)

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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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