GeForce GTX 650 Ti 2GB vs GeForce GTX 970M

Intro

Compare that to the GeForce GTX 970M, which features GPU clock speed of 924 MHz, and 3072 MB of GDDR5 memory running at 1000 MHz through a 192-bit bus. It also 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 GTX 970M		75 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 35 Watts (47%)

Memory Bandwidth

The GeForce GTX 970M should in theory perform a bit faster than the GeForce GTX 650 Ti 2GB in general. (explain)

GeForce GTX 970M		96000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 9600 (11%)

Texel Rate

The GeForce GTX 970M will be quite a bit (more or less 24%) more effective at anisotropic filtering than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 14528 (24%)

Pixel Rate

If using lots of anti-aliasing 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 650 Ti 2GB		14848 Mpixels/sec
	Difference: 29504 (199%)

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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 applied per second. This is worked out by multiplying the total number of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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 - the lower the bandwidth is, the lower the potential to get to the max fill rate.