GeForce GTX 880M vs Radeon HD 4830 1GB

Intro

Compare those specifications to the Radeon HD 4830 1GB, which features a clock frequency of 575 MHz and a GDDR4 memory speed of 900 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It is comprised of 640(128x5) SPUs, 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

Theoretically, the GeForce GTX 880M should be much faster than the Radeon HD 4830 1GB in general. (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 quite a bit (approximately 564%) more effective at AF 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 will be a lot (more or less 232%) faster with regards to FSAA than the Radeon HD 4830 1GB, and also able to handle higher screen resolutions without losing too much performance. (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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.