GeForce GT 315 vs GeForce GTX 470

Intro

Compare those specifications to the GeForce GTX 470, which features GPU clock speed of 607 MHz, and 1280 MB of GDDR5 RAM running at 837 MHz through a 320-bit bus. It also is comprised of 448 SPUs, 56 TAUs, and 40 Raster Operation Units.

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

As far as performance goes, the GeForce GTX 470 should theoretically be a lot better 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 a lot (about 240%) faster with regards to texture filtering than the GeForce GT 315. (explain)

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

Pixel Rate

The GeForce GTX 470 should be much (approximately 386%) better at FSAA than the GeForce GT 315, and will be capable of handling higher resolutions without slowing down too much. (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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.