GeForce GT 220 GDDR3 vs Radeon HD 5450

Intro

Compare that to the Radeon HD 5450, which features GPU clock speed of 650 MHz, and 512 MB of DDR3 RAM set to run at 800 MHz through a 64-bit bus. It also features 80(16x5) Stream Processors, 8 TAUs, and 4 Raster Operation Units.

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

Theoretically speaking, the GeForce GT 220 GDDR3 should be 153% faster than the Radeon HD 5450 overall, because of its higher bandwidth. (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 much (about 92%) better at 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

If running with a high screen resolution is important to you, then the GeForce GT 220 GDDR3 is superior to the Radeon HD 5450, by far. (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 maximum amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at 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 could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.