GeForce GTX 275 vs GeForce GTX 970M

Intro

Compare that to the GeForce GTX 970M, which features GPU core speed of 924 MHz, and 3072 MB of GDDR5 memory running at 1000 MHz through a 192-bit bus. It also is made up of 1280 Stream Processors, 80 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M		75 Watts
GeForce GTX 275		219 Watts
	Difference: 144 Watts (192%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 is 32% faster than the GeForce GTX 970M overall, due to its greater data rate. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 970M		96000 MB/sec
	Difference: 31008 (32%)

Texel Rate

The GeForce GTX 970M should be a lot (about 46%) faster with regards to AF than the GeForce GTX 275. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 23280 (46%)

Pixel Rate

The GeForce GTX 970M should be much (more or less 150%) better at FSAA than the GeForce GTX 275, and able to handle higher resolutions better. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 26628 (150%)

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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video 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 - sometimes also referred to as 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.