GeForce GTX 650 Ti 2GB vs GeForce GTX 980M

Intro

Compare that to the GeForce GTX 980M, which makes use of a 28 nm design. nVidia has clocked the core speed at 1038 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this specific card. It features 1536 SPUs along with 96 TAUs and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 10 Watts (10%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be 48% quicker than the GeForce GTX 650 Ti 2GB in general, because of its greater bandwidth. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 41600 (48%)

Texel Rate

The GeForce GTX 980M will be a lot (more or less 68%) more effective at AF than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 40256 (68%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 980M is a better choice, and very much so. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 51584 (347%)

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 MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.