GeForce GTX 880M vs Radeon HD 4850 512MB

Intro

Compare those specs to the Radeon HD 4850 512MB, which comes with core speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB		110 Watts
GeForce GTX 880M		130 Watts
	Difference: 20 Watts (18%)

Memory Bandwidth

In theory, the GeForce GTX 880M should be 101% quicker than the Radeon HD 4850 512MB in general, because of its greater bandwidth. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 64448 (101%)

Texel Rate

The GeForce GTX 880M should be a lot (more or less 388%) better at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 97112 (388%)

Pixel Rate

The GeForce GTX 880M should be much (approximately 205%) more effective at anti-aliasing than the Radeon HD 4850 512MB, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 20528 (205%)

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 largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, 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 maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.