GeForce GT 315 vs GeForce GTX 480

Intro

Compare those specifications to the GeForce GTX 480, which has GPU clock speed of 700 MHz, and 1536 MB of GDDR5 memory set to run at 924 MHz through a 384-bit bus. It also features 480 SPUs, 60 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GTX 480		250 Watts
	Difference: 198 Watts (381%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 is 602% faster than the GeForce GT 315 overall, because of its higher bandwidth. (explain)

GeForce GTX 480		177408 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 152128 (602%)

Texel Rate

The GeForce GTX 480 is quite a bit (approximately 320%) faster with regards to texture filtering than the GeForce GT 315. (explain)

GeForce GTX 480		42000 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 32000 (320%)

Pixel Rate

The GeForce GTX 480 will be much (more or less 572%) faster with regards to AA than the GeForce GT 315, and also will be able to handle higher screen resolutions better. (explain)

GeForce GTX 480		33600 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 28600 (572%)

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 largest amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.