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Originally Posted by wubrgamer
SAS options?
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Serial-Attached SCSI.
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other than "bigger" and "faster" What is the difference?
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More reliable and expandable. They use better-quality parts as a rule, and the error-checking memory makes a big difference, particularly when you have very large amounts of memory. You don't want the bridge to fail because you had a flipped bit in memory that propogated through the rest of your calculation.
They also tend to use cards like nVidia's Quadros, which have specially-written drivers for things like AutoCAD and so forth. You can of course get these for "regular" PCs as well, but they are terribly expensive and they don't play games that well. So people don't buy them unless they use traditional engineering (like CAD/CAM/FEM) applications.