GeForce 830M vs GeForce GTX 980M

Intro

Compare those specs to the GeForce GTX 980M, which features GPU core speed of 1038 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 Stream Processors, 96 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 980M		100 Watts
	Difference: 75 Watts (300%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be 789% faster than the GeForce 830M overall, due to its higher bandwidth. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 113600 (789%)

Texel Rate

The GeForce GTX 980M should be much (more or less 505%) better at AF than the GeForce 830M. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 83184 (505%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 980M is a better choice, by a large margin. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 58200 (707%)

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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.