GeForce GTX 460 2GB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which features GPU core speed of 607 MHz, and 1024 MB of GDDR5 memory running at 802 MHz through a 256-bit bus. It also features 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 GTX 460 2GB		160 Watts
GeForce GTX 465		200 Watts
	Difference: 40 Watts (25%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 2GB should in theory be a little bit superior to the GeForce GTX 465 overall. (explain)

GeForce GTX 460 2GB		115200 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 12608 (12%)

Texel Rate

The GeForce GTX 460 2GB is a lot (more or less 42%) more effective at AF than the GeForce GTX 465. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 11092 (42%)

Pixel Rate

The GeForce GTX 460 2GB will be just a bit (approximately 11%) better at full screen anti-aliasing than the GeForce GTX 465, and should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 2176 (11%)

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 max amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs 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 rate is also dependant on lots of 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.