Time-Capsule Network Speed slows down
I've taken to monitoring the TC wireless speed using the airport utility. My airport devices will operate normally at about 54 Mbps and my PC clients at about 113 Mbps (I have Netgear N cards in the PCs that operate at about 108 Mbps). When the performance drops, my Mac devices will drop to around 5Mbps and the PCs will drop to 54 Mbps. Performance will continue to degrade until everything is running at 1 to 5 Mbps. I reboot the TC and everything returns to normal for another week.
Any thoughts as to what could be causing this?
Power Mac G5, Dual 2.5 GHz, Mac OS X (10.4.9)