GeForce GTX 280 vs GeForce GTX 880M

Intro

Compare that to the GeForce GTX 880M, which comes with a GPU core clock speed of 954 MHz, and 4096 MB of GDDR5 memory set to run at 1000 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce GTX 280		236 Watts
	Difference: 106 Watts (82%)

Memory Bandwidth

The GeForce GTX 280 should in theory be a little bit faster than the GeForce GTX 880M overall. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 13696 (11%)

Texel Rate

The GeForce GTX 880M is much (approximately 154%) better at AF than the GeForce GTX 280. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 73952 (154%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 880M is a better choice, by far. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 11264 (58%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.