GeForce GTS 150 vs GeForce GTX 550 Ti

Intro

Compare all of that to the GeForce GTX 550 Ti, which features a clock speed of 900 MHz and a GDDR5 memory frequency of 1026 MHz. It also features a 192-bit memory bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti		116 Watts
GeForce GTS 150		141 Watts
	Difference: 25 Watts (22%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 550 Ti is 208% faster than the GeForce GTS 150 overall, because of its higher bandwidth. (explain)

GeForce GTX 550 Ti		98496 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 66496 (208%)

Texel Rate

The GeForce GTS 150 will be much (about 64%) more effective at texture filtering than the GeForce GTX 550 Ti. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GTX 550 Ti		28800 Mtexels/sec
	Difference: 18560 (64%)

Pixel Rate

The GeForce GTX 550 Ti is quite a bit (about 82%) more effective at FSAA than the GeForce GTS 150, and also able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 9760 (82%)

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 (counted in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the 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 most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.