GeForce GTX 465 vs GeForce GTX 880M

Intro

Compare all of that to the GeForce GTX 880M, which uses a 28 nm design. nVidia has set the core frequency at 954 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this card. It features 1536 SPUs along with 128 TAUs 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 465		200 Watts
	Difference: 70 Watts (54%)

Memory Bandwidth

Performance-wise, the GeForce GTX 880M should in theory be much better than the GeForce GTX 465 overall. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 25408 (25%)

Texel Rate

The GeForce GTX 880M should be a lot (approximately 357%) better at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 95404 (357%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 880M is the winner, by a large margin. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 11104 (57%)

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 max amount of information (in units of MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.