GeForce GT 315 vs GeForce GTX 465

Intro

Compare those specifications to the GeForce GTX 465, which comes with a clock frequency of 607 MHz and a GDDR5 memory speed of 802 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It features 352 SPUs, 44 Texture Address Units, 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 465		200 Watts
	Difference: 148 Watts (285%)

Memory Bandwidth

In theory, the GeForce GTX 465 should be a lot faster than the GeForce GT 315 overall. (explain)

GeForce GTX 465		102592 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 77312 (306%)

Texel Rate

The GeForce GTX 465 should be a lot (approximately 167%) better at anisotropic filtering than the GeForce GT 315. (explain)

GeForce GTX 465		26708 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 16708 (167%)

Pixel Rate

The GeForce GTX 465 is much (more or less 288%) faster with regards to anti-aliasing than the GeForce GT 315, and also capable of handling higher resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 14424 (288%)

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 within a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.