GeForce GTS 450 vs GeForce GTX 650 Ti 2GB

Intro

Compare those specs to the GeForce GTX 650 Ti 2GB, which features GPU clock speed of 928 MHz, and 2048 MB of GDDR5 memory running at 1350 MHz through a 128-bit bus. It also features 768 Stream Processors, 64 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce GTX 650 Ti 2GB		110 Watts
	Difference: 4 Watts (4%)

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti 2GB should in theory be a lot superior to the GeForce GTS 450 in general. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 28672 (50%)

Texel Rate

The GeForce GTX 650 Ti 2GB is a lot (about 137%) better at anisotropic filtering than the GeForce GTS 450. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 34336 (137%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 650 Ti 2GB is the winner, though not by far. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
GeForce GTS 450		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 data (counted in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 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 clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.