GeForce GTX 285 2GB vs GeForce GTX 470

Intro

Compare those specs to the GeForce GTX 470, which features GPU core speed of 607 MHz, and 1280 MB of GDDR5 RAM set to run at 837 MHz through a 320-bit bus. It also is made up of 448 Stream Processors, 56 Texture Address Units, and 40 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
GeForce GTX 470		215 Watts
	Difference: 11 Watts (5%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 2GB should in theory be just a bit better than the GeForce GTX 470 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 470		133920 MB/sec
	Difference: 25056 (19%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (more or less 53%) better at texture filtering than the GeForce GTX 470. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 17848 (53%)

Pixel Rate

The GeForce GTX 470 is a little bit (more or less 17%) more effective at FSAA than the GeForce GTX 285 2GB, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 3544 (17%)

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 information (measured in MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 reach the maximum fill rate.