GeForce GT 320 vs GeForce GTX 970M

Intro

Compare all of that to the GeForce GTX 970M, which uses a 28 nm design. nVidia has set the core frequency at 924 MHz. The GDDR5 memory works at a speed of 1000 MHz on this specific model. It features 1280 SPUs along with 80 Texture Address Units and 48 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 970M		75 Watts
	Difference: 32 Watts (74%)

Memory Bandwidth

In theory, the GeForce GTX 970M is 280% quicker than the GeForce GT 320 in general, due to its greater data rate. (explain)

GeForce GTX 970M		96000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 70720 (280%)

Texel Rate

The GeForce GTX 970M should be a lot (about 470%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 60960 (470%)

Pixel Rate

The GeForce GTX 970M is quite a bit (approximately 927%) better at anti-aliasing than the GeForce GT 320, and capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 40032 (927%)

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 (in units of MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that can be processed in one second. This number is worked out 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.