GeForce GT 430 vs Radeon HD 4830 512MB

Intro

Compare all that to the Radeon HD 4830 512MB, which makes use of a 55 nm design. AMD has set the core speed at 575 MHz. The GDDR3 memory runs at a speed of 900 MHz on this model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430		60 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 35 Watts (58%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4830 512MB will be 100% quicker than the GeForce GT 430 overall, because of its higher data rate. (explain)

Radeon HD 4830 512MB		57600 MB/sec
GeForce GT 430		28800 MB/sec
	Difference: 28800 (100%)

Texel Rate

The Radeon HD 4830 512MB will be much (approximately 64%) better at texture filtering than the GeForce GT 430. (explain)

Radeon HD 4830 512MB		18400 Mtexels/sec
GeForce GT 430		11200 Mtexels/sec
	Difference: 7200 (64%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4830 512MB is the winner, by a large margin. (explain)

Radeon HD 4830 512MB		9200 Mpixels/sec
GeForce GT 430		2800 Mpixels/sec
	Difference: 6400 (229%)

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 (counted in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, 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 most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.