GeForce GT 320 vs GeForce GTX 970

Intro

Compare all that to the GeForce GTX 970, which comes with a GPU core clock speed of 1050 MHz, and 4096 MB of GDDR5 memory set to run at 1750 MHz through a 256-bit bus. It also is comprised of 1664 Stream Processors, 104 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 970		145 Watts
	Difference: 102 Watts (237%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 970 should be 786% quicker than the GeForce GT 320 overall, due to its greater data rate. (explain)

GeForce GTX 970		224000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 198720 (786%)

Texel Rate

The GeForce GTX 970 is quite a bit (more or less 743%) faster with regards to AF than the GeForce GT 320. (explain)

GeForce GTX 970		109200 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 96240 (743%)

Pixel Rate

The GeForce GTX 970 should be quite a bit (about 1456%) more effective at full screen anti-aliasing than the GeForce GT 320, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 970		67200 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 62880 (1456%)

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 (measured in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.