Rings of Power talk!

[Inziladun]

Originally Posted by Radtech51

I'm not sure why Sauron would take away a great amount of their power like that? I understand some say that he needed their rings to control them but at that point didn't he already have control?

Sauron did indeed control the Nazgûl totally. I don't see not physically carrying the Nine causing any loss of the Ringwraiths' power, though. Once they entered the wraith-world, the effects on them should be the same as wearing the rings.
Any why would Sauron want them with himself? Safekeeping, maybe. The Nazgûl were capable of being destroyed, and Sauron would not have wanted his rings in unknown hands, especially when he lacked the One.

Originally Posted by Radtech51

PS: Has it ever been told how fast Sauron with the one ring could control the other rings of power? My reasoning is this at one point when Sauron first created the master ring shouldn't he pretty much have won the war at that moment?

With the One, Sauron could know the thoughts of the wearers of the other Rings of Power, but I don't think he "controlled" the rings themselves.
The One was tied to the other Rings, but it could only exact its influence on them if they and the One were in active use at the same time.