GeForce GTX 285 1GB vs GeForce GTX 480

Intro

Compare all that to the GeForce GTX 480, which comes with a clock speed of 700 MHz and a GDDR5 memory frequency of 924 MHz. It also makes use of a 384-bit memory bus, and uses a 40 nm design. It is made up of 480 SPUs, 60 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB		204 Watts
GeForce GTX 480		250 Watts
	Difference: 46 Watts (23%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 480 should in theory be a small bit better than the GeForce GTX 285 1GB in general. (explain)

GeForce GTX 480		177408 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 18432 (12%)

Texel Rate

The GeForce GTX 285 1GB will be much (more or less 23%) more effective at anisotropic filtering than the GeForce GTX 480. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 480		42000 Mtexels/sec
	Difference: 9840 (23%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 480 is superior to the GeForce GTX 285 1GB, by far. (explain)

GeForce GTX 480		33600 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 12864 (62%)

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 (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.