GeForce GTS 450 1GB 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 works at a frequency of 1350 MHz on this model. It features 768 SPUs as well as 64 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 4 Watts (4%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti should in theory be much superior to the GeForce GTS 450 1GB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 28672 (50%)

Texel Rate

The GeForce GTX 650 Ti will be quite a bit (about 137%) faster with regards to texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 34336 (137%)

Pixel Rate

The GeForce GTX 650 Ti should be just a bit (about 19%) better at AA than the GeForce GTS 450 1GB, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 2320 (19%)

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 largest amount of information (measured in MB per second) that can be moved over the external memory interface within 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, the result should be multiplied by 2 once again. If 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.