GeForce GTX 660 Ti vs Radeon HD 4830 512MB

Intro

Compare all of that to the Radeon HD 4830 512MB, which comes with core clock speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 55 Watts (58%)

Memory Bandwidth

The GeForce GTX 660 Ti should in theory be a lot faster than the Radeon HD 4830 512MB in general. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 86400 (150%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (more or less 457%) faster with regards to texture filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 84080 (457%)

Pixel Rate

The GeForce GTX 660 Ti should be much (about 139%) faster with regards to anti-aliasing than the Radeon HD 4830 512MB, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 12760 (139%)

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 past the external memory interface within a second. The number 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 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.