GeForce GT 315 vs GeForce GTX 470

Intro

Compare those specs to the GeForce GTX 470, which features GPU clock speed of 607 MHz, and 1280 MB of GDDR5 RAM set to run at 837 MHz through a 320-bit bus. It also is made up of 448 Stream Processors, 56 TAUs, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GTX 470		215 Watts
	Difference: 163 Watts (313%)

Memory Bandwidth

The GeForce GTX 470, in theory, should perform quite a bit faster than the GeForce GT 315 in general. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 108640 (430%)

Texel Rate

The GeForce GTX 470 should be quite a bit (more or less 240%) more effective at anisotropic filtering than the GeForce GT 315. (explain)

GeForce GTX 470		33992 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 23992 (240%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 470 is the winner, by a large margin. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 19280 (386%)

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 max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at 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 the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.