GeForce GTX 280 vs GeForce GTX 285 2GB

Intro

Compare that to the GeForce GTX 285 2GB, which has GPU clock speed of 648 MHz, and 2048 MB of GDDR3 RAM running at 1242 MHz through a 512-bit bus. It also is made up of 240 Stream Processors, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
GeForce GTX 280		236 Watts
	Difference: 32 Watts (16%)

Memory Bandwidth

The GeForce GTX 285 2GB should in theory perform a bit faster than the GeForce GTX 280 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 280		141696 MB/sec
	Difference: 17280 (12%)

Texel Rate

The GeForce GTX 285 2GB will be a little bit (approximately 8%) faster with regards to texture filtering than the GeForce GTX 280. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 3680 (8%)

Pixel Rate

The GeForce GTX 285 2GB should be a small bit (more or less 8%) better at AA than the GeForce GTX 280, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 1472 (8%)

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 megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the 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 clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.