According to 'mactracker.ca' database application and other archives, your G5 among
other PowerPC models cannot exceed the last Mac OS X that series can run. 10.5.8.
Other systems such as Linux/Mac may still have a version for PPC Mac hardware.
The model is considered a Late 2005 Power Mac G5 with specific builds to that series.
2-core per CPU. And final, w/ quad 'liquid-cooled' dual 2.5, problematic to keep running.
Memory and HDD can be upgraded, even an SSD (Legacy OWC for PATA/IDE) will work.
The SSD + HDD could be configured for better load-speed runtime, for some applications.
Memory Slots 8 - 240-pin PC2-4200 (533MHz) DDR2 ECC or NECC SDRAM (matched pairs)
Model Identifier PowerMac11,2
Model Number A1117
EMC 2023
Order Number M9590LL/A (2.0 GHz), M9591LL/A (2.3 GHz), M9592LL/A (dual 2.5 GHz)
IF yours is quad core (dual 2.5) hardware options from owc appear here:
Upgrades for Power Mac G5 Quad 2.5GHz 'Dual Core/Late 2005' (October, 2005)
There's no 'intel CPU upgrade' to the Power PC G5, & no support for later Mac OSX.
