GeForce GTX 280 vs GeForce GTX 285 1GB

Intro

Compare that to the GeForce GTX 285 1GB, which has clock speeds of 648 MHz on the GPU, and 1242 MHz on the 1024 MB of GDDR3 memory. It features 240 SPUs as well as 80 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB		204 Watts
GeForce GTX 280		236 Watts
	Difference: 32 Watts (16%)

Memory Bandwidth

The GeForce GTX 285 1GB, in theory, should perform a small bit faster than the GeForce GTX 280 in general. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 280		141696 MB/sec
	Difference: 17280 (12%)

Texel Rate

The GeForce GTX 285 1GB will be a little bit (approximately 8%) faster with regards to texture filtering than the GeForce GTX 280. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 3680 (8%)

Pixel Rate

The GeForce GTX 285 1GB should be a small bit (about 8%) faster with regards to full screen anti-aliasing than the GeForce GTX 280, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 285 1GB		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: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.