GeForce GTX 275 vs GeForce GTX 970M

Intro

Compare those specifications to the GeForce GTX 970M, which comes with a clock frequency of 924 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 192-bit bus, and uses a 28 nm design. It features 1280 SPUs, 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

Performance-wise, the GeForce GTX 275 should in theory be much superior to the GeForce GTX 970M in general. (explain)

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

Texel Rate

The GeForce GTX 970M should be quite a bit (about 46%) better at anisotropic filtering than the GeForce GTX 275. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 970M is a better choice, by a large margin. (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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.