GeForce GTX 550 Ti vs Radeon HD 4830 1GB

Intro

Compare those specs to the Radeon HD 4830 1GB, which features a core clock speed of 575 MHz and a GDDR4 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is comprised of 640(128x5) SPUs, 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 1GB		95 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 21 Watts (22%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 550 Ti should in theory be quite a bit better than the Radeon HD 4830 1GB overall. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 40896 (71%)

Texel Rate

The GeForce GTX 550 Ti should be a lot (about 57%) more effective at anisotropic filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 10400 (57%)

Pixel Rate

The GeForce GTX 550 Ti should be quite a bit (more or less 135%) faster with regards to anti-aliasing than the Radeon HD 4830 1GB, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 4830 1GB		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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. 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 many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.