I'm starting this thread to discuss all of the following, for Powermac G5 systems: System Upgrades PCI Cards PCI-33 Cards: 1.6 and 1.8GHz systems with the 32/64-bit PCI-33 Southbridge PCI-X Cards: 2.0Ghz through 2.7Ghz G5s, with the PCI-X Southbridge PCIe Cards: Quad-Core G5s with the PCIe Southbridge RAM Upgrades PC-2700: PCI-33 Systems with the early Northbridge PC-3200: PCI-X Systems with the 2004/2005 Northbridge (2.0Ghz) PC-3200: PCI-X Systemns with the 2005 Northbridge (2.5/2.7GHz)* PC-4200: PCIe Systems with the last Northbridge variant (Liquid Cooled Quad G5s) Processor Upgrades Changing CPUs from one system to another. Attenuating and Calibrating CPUs Thermal Enhancements Overclocking HDD Upgrades SATA Upgrades & Drives SAS Upgrades & Drives SSDs and Similar Devices Optical Drive Upgrades eSATA & NAS SCSI-III Service & Repair Essential facts on repairing G5s. Q&A for G5 Service Repair, Diagnostics, and Service Flowcharts Service FAQs. Video Cards & Displays Viedo card upgrades: *PCI *PCI-X *PCIe *AGP. Multi-Display Setup and Options Networking & *nix Server Use LAG Options Remote Access Shell Scripts Command Line Performance Options Developer & Server Tools for General Use Other System Optimisation G5 Software; especially G5-enabled software. Other G5-Specific topics. If you have anything to contribute, please do so. I would appreciate if someone could sticky this topic, to make it prominent for people to view, and to contribute to it. I think a good, initial point of interest is overclocking, CPU changing, and the related thermal calibration, and thermal dispersion methods. Does anyone have something to contribute along these lines? I will work on some points of interest, and post them. Please note that I request that double-posting in this thread be allowed, purely to allow multiple topics to be contained in single posts, so that if a person wishes to post regarding PCI cards and about networking, that they may post two replies, each covering one subject, for thread, and quoting cleanliness, to improve readability.