GeForce GTX 880M vs Radeon HD 4830 1GB

Intro

Compare those specifications to the Radeon HD 4830 1GB, which comes with core speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 memory. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
GeForce GTX 880M		130 Watts
	Difference: 35 Watts (37%)

Memory Bandwidth

In theory, the GeForce GTX 880M should be 122% quicker than the Radeon HD 4830 1GB overall, because of its greater data rate. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 70400 (122%)

Texel Rate

The GeForce GTX 880M will be a lot (about 564%) faster with regards to texture filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 103712 (564%)

Pixel Rate

The GeForce GTX 880M is much (more or less 232%) better at anti-aliasing than the Radeon HD 4830 1GB, and able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 21328 (232%)

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 transferred across the external memory interface in one 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 ANOTHER 2x. The better 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 processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling 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 chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's 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 also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.