GeForce GT 315 vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which comes with a clock speed of 1006 MHz and a GDDR5 memory frequency of 1502 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Geforce GTX 680		195 Watts
	Difference: 143 Watts (275%)

Memory Bandwidth

The Geforce GTX 680, in theory, should perform a lot faster than the GeForce GT 315 overall. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 166976 (661%)

Texel Rate

The Geforce GTX 680 should be quite a bit (more or less 1188%) more effective at anisotropic filtering than the GeForce GT 315. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 118768 (1188%)

Pixel Rate

If running with high levels of AA is important to you, then the Geforce GTX 680 is superior to the GeForce GT 315, by far. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 27192 (544%)

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 maximum amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.