GeForce GTX 275 vs GeForce GTX 650 Ti

Intro

Compare those specifications to the GeForce GTX 650 Ti, which comes with GPU clock speed of 928 MHz, and 1024 MB of GDDR5 RAM running 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		110 Watts
GeForce GTX 275		219 Watts
	Difference: 109 Watts (99%)

Memory Bandwidth

In theory, the GeForce GTX 275 should be 47% quicker than the GeForce GTX 650 Ti overall, because of its greater bandwidth. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 40608 (47%)

Texel Rate

The GeForce GTX 650 Ti is a small bit (about 17%) more effective at AF than the GeForce GTX 275. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 8752 (17%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 275 is the winner, though not by far. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 650 Ti		14848 Mpixels/sec
	Difference: 2876 (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 maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling 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 that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.