GeForce GTX 285 2GB vs GeForce GTX 590

Intro

Compare all of that to the GeForce GTX 590, which features GPU core speed of 607 MHz, and 1536 MB of GDDR5 RAM set to run at 855 MHz through a 384-bit bus. It also is made up of 512 SPUs, 64 Texture Address Units, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
GeForce GTX 590		365 Watts
	Difference: 161 Watts (79%)

Memory Bandwidth

In theory, the GeForce GTX 590 is 107% faster than the GeForce GTX 285 2GB overall, because of its greater data rate. (explain)

GeForce GTX 590		328320 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 169344 (107%)

Texel Rate

The GeForce GTX 590 should be a lot (approximately 50%) better at texture filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 590		77696 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 25856 (50%)

Pixel Rate

The GeForce GTX 590 is quite a bit (about 181%) more effective at full screen anti-aliasing than the GeForce GTX 285 2GB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 590		58272 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 37536 (181%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most 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 colour ROPs by the the core 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 output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.