GeForce GTX 660 vs GeForce GTX 880M

Intro

Compare all of that to the GeForce GTX 880M, which comes with a clock frequency of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

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

Theoretically, the GeForce GTX 660 should 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 quite a bit (more or less 56%) faster with regards to texture filtering than the GeForce GTX 660. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 880M is a better choice, by far. (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 largest amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are 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 the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.