GeForce GTX 550 Ti vs Radeon HD 4830 512MB

Intro

Compare all of that to the Radeon HD 4830 512MB, which has a GPU core clock speed of 575 MHz, and 512 MB of GDDR3 memory set to run at 900 MHz through a 256-bit bus. It also is made up of 640(128x5) Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 21 Watts (22%)

Memory Bandwidth

Theoretically, the GeForce GTX 550 Ti should perform a lot faster than the Radeon HD 4830 512MB overall. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 40896 (71%)

Texel Rate

The GeForce GTX 550 Ti should be much (more or less 57%) more effective at texture filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 10400 (57%)

Pixel Rate

The GeForce GTX 550 Ti will be much (about 135%) more effective at FSAA than the Radeon HD 4830 512MB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 12400 (135%)

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 information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many 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.