GeForce GTX 660 vs GeForce GTX 880M

Intro

Compare all of that to the GeForce GTX 880M, which features GPU core speed of 954 MHz, and 4096 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 880M		6360 points
GeForce GTX 660		5063 points
	Difference: 1297 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce GTX 660		140 Watts
	Difference: 10 Watts (8%)

Memory Bandwidth

The GeForce GTX 660 should theoretically be a little bit faster than the GeForce GTX 880M in general. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 16192 (13%)

Texel Rate

The GeForce GTX 880M should be much (approximately 56%) faster with regards to anisotropic filtering than the GeForce GTX 660. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 43712 (56%)

Pixel Rate

The GeForce GTX 880M will be quite a bit (approximately 30%) better at AA than the GeForce GTX 660, and should be able to handle higher resolutions better. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 7008 (30%)

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 maximum amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed 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 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 the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.