GeForce GT 315 vs GeForce GTX 465

Intro

Compare those specifications to the GeForce GTX 465, which has GPU core speed of 607 MHz, and 1024 MB of GDDR5 RAM running at 802 MHz through a 256-bit bus. It also is made up of 352 Stream Processors, 44 Texture Address Units, and 32 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 465		200 Watts
	Difference: 148 Watts (285%)

Memory Bandwidth

The GeForce GTX 465 should theoretically perform quite a bit faster than the GeForce GT 315 in general. (explain)

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

Texel Rate

The GeForce GTX 465 will be a lot (approximately 167%) faster with regards to 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 will be quite a bit (approximately 288%) more effective at full screen anti-aliasing than the GeForce GT 315, and should be able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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