GeForce GTX 880M vs Radeon HD 3690/3830

Intro

Compare all of that to the Radeon HD 3690/3830, which has GPU clock speed of 668 MHz, and 256 MB of GDDR3 RAM running at 828 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830		75 Watts
GeForce GTX 880M		130 Watts
	Difference: 55 Watts (73%)

Memory Bandwidth

The GeForce GTX 880M should in theory perform quite a bit faster than the Radeon HD 3690/3830 overall. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 101504 (383%)

Texel Rate

The GeForce GTX 880M will be a lot (about 1043%) better at texture filtering than the Radeon HD 3690/3830. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 111424 (1043%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 880M is superior to the Radeon HD 3690/3830, by far. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 19840 (186%)

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 largest amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 can be applied per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called 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 max fill rate.