GeForce 9800 GTX+ vs GeForce GTX 980M

Intro

Compare those specs to the GeForce GTX 980M, which comes with core speeds of 1038 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1536 SPUs as well as 96 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 45 Watts (45%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be a lot faster than the GeForce 9800 GTX+ overall. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce 9800 GTX+		70400 MB/sec
	Difference: 57600 (82%)

Texel Rate

The GeForce GTX 980M should be quite a bit (more or less 111%) faster with regards to anisotropic filtering than the GeForce 9800 GTX+. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce 9800 GTX+		47232 Mtexels/sec
	Difference: 52416 (111%)

Pixel Rate

The GeForce GTX 980M should be quite a bit (about 463%) faster with regards to AA than the GeForce 9800 GTX+, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 54624 (463%)

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 (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.