GeForce GTS 150 vs GeForce GTX 650 Ti 2GB

Intro

Compare that to the GeForce GTX 650 Ti 2GB, which comes with a GPU core clock speed of 928 MHz, and 2048 MB of GDDR5 memory set to run at 1350 MHz through a 128-bit bus. It also is made up of 768 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTS 150		141 Watts
	Difference: 31 Watts (28%)

Memory Bandwidth

In theory, the GeForce GTX 650 Ti 2GB is 170% faster than the GeForce GTS 150 overall, due to its greater bandwidth. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 54400 (170%)

Texel Rate

The GeForce GTX 650 Ti 2GB is much (more or less 25%) faster with regards to texture filtering than the GeForce GTS 150. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 12032 (25%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 650 Ti 2GB is the winner, by far. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 3008 (25%)

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 past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.