GeForce GTX 880M vs Radeon HD 3690/3830

Intro

Compare those specs to the Radeon HD 3690/3830, which has a clock speed of 668 MHz and a GDDR3 memory speed of 828 MHz. It also makes use of a 128-bit bus, and makes use of a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce GTX 880M should be 383% quicker than the Radeon HD 3690/3830 in general, due to its greater data rate. (explain)

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

Texel Rate

The GeForce GTX 880M should be a lot (about 1043%) faster with regards to anisotropic 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 a high screen resolution is important to you, then the GeForce GTX 880M is a better choice, by a large margin. (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: Bandwidth is the max amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs 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 output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.