GeForce GT 315 vs GeForce GTX 550 Ti

Intro

Compare those specs to the GeForce GTX 550 Ti, which has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also features a 192-bit bus, and makes use of a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 64 Watts (123%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 550 Ti should theoretically be much superior to the GeForce GT 315 overall. (explain)

GeForce GTX 550 Ti		98496 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 73216 (290%)

Texel Rate

The GeForce GTX 550 Ti should be quite a bit (about 188%) faster with regards to anisotropic filtering than the GeForce GT 315. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 18800 (188%)

Pixel Rate

The GeForce GTX 550 Ti is a lot (approximately 332%) faster with regards to AA than the GeForce GT 315, and will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 16600 (332%)

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 megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's 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 output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.