CNET

Power Mac G5 uniprocessor firmware update: System instability for 1.6 GHz models

System instability for 1.6 GHz models A fairly large number of readers are reporting significant system instability on Power Mac G5 1.6 GHz models after applying the Power Mac G5 5.1.5f1 firmware ...
CNET

Power Mac G5 Uniprocessor 5.1.5f1 Firmware update (#2): Problems installing, workaround

Yesterday we reported the release of the Power Mac G5 Uniprocessor 5.1.5f1 Firmware update which resolves a previously reported issue where single-processor G5s refused to sleep. We've since received ...
Macworld

Apple offers G5 firmware update

Apple on Monday released a firmware update for its Power Mac G5 systems. The 5.1.4 firmware update is available for download through the Software Update System Preferences pane. The update provides ...
Ars Technica

G5 PowerMac Uniprocessor firmware update in SU

"The Power Mac G5 Uniprocessor Firmware Update improves general system reliability and restores sleep functionality."<BR><BR>FYI. <BR><BR>I haven't installed it myself since on my G5 1.6 I've had no ...