GeForce GTX 460 2GB vs GeForce GTX 465

Intro

Compare that to the GeForce GTX 465, which comes with a clock frequency of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is comprised of 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 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 theoretically be a small 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 should be 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 should be just a bit (about 11%) better at full screen anti-aliasing than the GeForce GTX 465, and should be able to handle higher screen resolutions more effectively. (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 largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, 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 chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 ability to get to the maximum fill rate.