GeForce GT 340 1GB vs GeForce GTX 970M

Intro

Compare those specifications to the GeForce GTX 970M, which has a core clock speed of 924 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 192-bit memory bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
GeForce GTX 970M		75 Watts
	Difference: 6 Watts (9%)

Memory Bandwidth

The GeForce GTX 970M, in theory, should perform quite a bit faster than the GeForce GT 340 1GB overall. (explain)

GeForce GTX 970M		96000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 41600 (76%)

Texel Rate

The GeForce GTX 970M is quite a bit (approximately 320%) more effective at anisotropic filtering than the GeForce GT 340 1GB. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 56320 (320%)

Pixel Rate

The GeForce GTX 970M will be much (approximately 908%) more effective at full screen anti-aliasing than the GeForce GT 340 1GB, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 39952 (908%)

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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.