GeForce GTX 650 Ti 2GB 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 made up of 1664 SPUs, 104 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTX 970		145 Watts
	Difference: 35 Watts (32%)

Memory Bandwidth

In theory, the GeForce GTX 970 will be 159% quicker than the GeForce GTX 650 Ti 2GB overall, because of its higher bandwidth. (explain)

GeForce GTX 970		224000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 137600 (159%)

Texel Rate

The GeForce GTX 970 will be a lot (about 84%) more effective at AF than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 970		109200 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 49808 (84%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 970 is a better choice, by a large margin. (explain)

GeForce GTX 970		67200 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 52352 (353%)

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 data (counted in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This is calculated 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 video 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 number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.