GeForce GTX 285 1GB vs GeForce GTX 465

Intro

Compare those specifications to the GeForce GTX 465, which features 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 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 4 Watts (2%)

Memory Bandwidth

The GeForce GTX 285 1GB should in theory perform much faster than the GeForce GTX 465 overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 56384 (55%)

Texel Rate

The GeForce GTX 285 1GB should be much (about 94%) more effective at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 25132 (94%)

Pixel Rate

The GeForce GTX 285 1GB is just a bit (more or less 7%) better at anti-aliasing than the GeForce GTX 465, and able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 1312 (7%)

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 information (measured in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.