GeForce GTX 285 1GB vs GeForce GTX 580

Intro

Compare those specs to the GeForce GTX 580, which features core clock speeds of 772 MHz on the GPU, and 1002 MHz on the 1536 MB of GDDR5 RAM. It features 512 SPUs along with 64 Texture Address Units and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB		204 Watts
GeForce GTX 580		244 Watts
	Difference: 40 Watts (20%)

Memory Bandwidth

The GeForce GTX 580, in theory, should perform much faster than the GeForce GTX 285 1GB in general. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 33408 (21%)

Texel Rate

The GeForce GTX 285 1GB is just a bit (about 5%) more effective at texture filtering than the GeForce GTX 580. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 2432 (5%)

Pixel Rate

The GeForce GTX 580 should be quite a bit (approximately 79%) more effective at AA than the GeForce GTX 285 1GB, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 16320 (79%)

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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 can be applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.