GeForce GTS 150 vs GeForce GTX 650 Ti

Intro

Compare all of that to the GeForce GTX 650 Ti, which uses a 28 nm design. nVidia has clocked the core frequency at 928 MHz. The GDDR5 memory runs at a frequency of 1350 MHz on this specific model. It features 768 SPUs as well as 64 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti is 170% faster than the GeForce GTS 150 in general, due to its greater data rate. (explain)

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

Texel Rate

The GeForce GTX 650 Ti is quite a bit (more or less 25%) more effective at AF than the GeForce GTS 150. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 650 Ti is the winner, by a large margin. (explain)

GeForce GTX 650 Ti		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 (in units of MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 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.