GeForce GTX 650 Ti 2GB vs GeForce GTX 860M

Intro

Compare those specifications to the GeForce GTX 860M, which uses a 28 nm design. nVidia has set the core speed at 797 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this specific model. It features 1152 SPUs along with 96 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 65 Watts (144%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti 2GB should in theory be quite a bit superior to the GeForce GTX 860M overall. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 22400 (35%)

Texel Rate

The GeForce GTX 860M is a lot (more or less 29%) more effective at texture filtering than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 860M		76512 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 17120 (29%)

Pixel Rate

The GeForce GTX 650 Ti 2GB will be a little bit (more or less 16%) faster with regards to anti-aliasing than the GeForce GTX 860M, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 2096 (16%)

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 (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once 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 number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.