GeForce 830M vs GeForce GTX 980

Intro

Compare those specifications to the GeForce GTX 980, which comes with a core clock speed of 1126 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 980		165 Watts
	Difference: 140 Watts (560%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980 should in theory be much better than the GeForce 830M overall. (explain)

GeForce GTX 980		224000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 209600 (1456%)

Texel Rate

The GeForce GTX 980 is much (approximately 775%) more effective at texture filtering than the GeForce 830M. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 127664 (775%)

Pixel Rate

The GeForce GTX 980 should be quite a bit (about 775%) faster with regards to AA than the GeForce 830M, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 63832 (775%)

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 maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core 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 output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.