Geforce GTX 760 vs Radeon HD 4830 1GB

Intro

Compare those specifications to the Radeon HD 4830 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 575 MHz. The GDDR4 RAM works at a frequency of 900 MHz on this model. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
Geforce GTX 760		170 Watts
	Difference: 75 Watts (79%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 760 will be 234% quicker than the Radeon HD 4830 1GB overall, due to its higher bandwidth. (explain)

Geforce GTX 760		192256 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 134656 (234%)

Texel Rate

The Geforce GTX 760 will be quite a bit (approximately 411%) better at AF than the Radeon HD 4830 1GB. (explain)

Geforce GTX 760		94080 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 75680 (411%)

Pixel Rate

If running with high levels of AA is important to you, then the Geforce GTX 760 is the winner, by a large margin. (explain)

Geforce GTX 760		31360 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 22160 (241%)

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 MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.