[quote user="Martin in Chicago"]has anyone successfully run 5.5 on a dual 2.26?[/quote]another 2 x 2.26 GHz Quad-core Nehalem user here (24GB RAM, standard card Nvidia GeForce GT120). OS X 10.6.7, Avid MC 5.5.1. For monitoring I use a MXO2 Mini. I use up to 4 external RAIDs (2TB each, mirrored) connected through eSata (via PCI cards). No problems