GeForce 9800 GTX+ vs GeForce GTX 880M

Intro

Compare those specifications to the GeForce GTX 880M, which has a core clock speed of 954 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It features 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 15 Watts (12%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M should be 82% quicker than the GeForce 9800 GTX+ overall, because of its greater data rate. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce 9800 GTX+		70400 MB/sec
	Difference: 57600 (82%)

Texel Rate

The GeForce GTX 880M should be much (about 159%) faster with regards to anisotropic filtering than the GeForce 9800 GTX+. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce 9800 GTX+		47232 Mtexels/sec
	Difference: 74880 (159%)

Pixel Rate

The GeForce GTX 880M is much (more or less 159%) faster with regards to full screen anti-aliasing than the GeForce 9800 GTX+, and also will be able to handle higher resolutions better. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 18720 (159%)

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 (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once 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 high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.