The 5000 series was different from the 500 series, it was a new generation of computers and the 570 wasn't a 5000 in hiding. But it's basically correct that yo

The 5000 series was different from the 500 series, it was a new generation of computers and the 570 wasn't a 5000 in hiding. But it's basically correct that you could field-upgrade some of the models to a faster model, not exactly by just snipping a wire, but you could e.g. change the cycle time, and enable caching. But to go from the 5200 to the 5400 you would need to change some boards too. Here's an overview: http://www.ndwiki.org/wiki/ND-5000_family#System_performance http://www.ndwiki.org/wiki/ND-5000_family#System_performance