GeForce GT 340 vs GeForce GTX 980M

Intro

Compare those specs to the GeForce GTX 980M, which comes with a GPU core clock speed of 1038 MHz, and 4096 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 96 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
GeForce GTX 980M		100 Watts
	Difference: 31 Watts (45%)

Memory Bandwidth

The GeForce GTX 980M, in theory, should perform a lot faster than the GeForce GT 340 overall. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 73600 (135%)

Texel Rate

The GeForce GTX 980M is a lot (approximately 466%) more effective at anisotropic filtering than the GeForce GT 340. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 82048 (466%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 980M is a better choice, and very much so. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 62032 (1410%)

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 data (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling 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 per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.