GeForce GT 340 vs GeForce GTX 860M

Intro

Compare that to the GeForce GTX 860M, which comes with GPU clock speed of 797 MHz, and 4096 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 1152 SPUs, 96 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GT 340		69 Watts
	Difference: 24 Watts (53%)

Memory Bandwidth

The GeForce GTX 860M, in theory, should perform a bit faster than the GeForce GT 340 in general. (explain)

GeForce GTX 860M		64000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 9600 (18%)

Texel Rate

The GeForce GTX 860M should be a lot (about 335%) better at AF than the GeForce GT 340. (explain)

GeForce GTX 860M		76512 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 58912 (335%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 860M is a better choice, and very much so. (explain)

GeForce GTX 860M		12752 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 8352 (190%)

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 information (measured in MB per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.