2003 Powermac G5 MBO + CPU upgrade? in CPUs, Motherboards, and Memory Posted November 9, 2016 Hey All! For a while I have been planning to take my early model 2003 Powermac G5 sporting a 1.6Ghz IBM G5 single core CPU and upgrading to the late 2005 Dual 2.7Ghz dual core IBM CPUs. And whilst I'm at it, upping my system to 16GB DDR3 1333Mhz RAM, and an Nvidia Geforce 7800GTX 512mb GPU. I know my current G5 Motherboard won't support all of this and so obviously I need to get one that supports the Dual 2.7Ghz IBM Dual core CPUs. Will this motherboard support this conversion: http://www.ebay.com.au/itm/Apple-Power-Mac-G5-Dual-Processor-630-6395-Main-Logic-Board-NEW-/302050067083?_trksid=p2141725.m3641.l6368 with these CPUs: http://www.ebay.com.au/itm/Apple-630-7008-T6891-Power-Mac-G5-2-7GHz-Liquid-Cooled-Processor-Assembly-/361420380003?_trksid=p2141725.m3641.l6368 Extra links: GPU: http://www.ebay.com.au/itm/Inno3D-GeForce-7800GTX-256MB-DDR3-TV-Ut-2x-DVi-PCI-Express-/321787404722?_trksid=p2141725.m3641.l6368 RAM: http://www.ebay.com.au/itm/16GB-KIT-8X-2GB-4200-ECC-Unbuffered-Apple-Power-Mac-G5-Quad-Dual-Core-Memory-Ram-/221980917317?hash=item33af17fe45:g:Bw0AAOSwUdlWgunD Thanks all!