Epox 8RDA/+ is great
All T-bred CPU is factory unlocked but with Epox 8RDA, it give access to multiplier from 3x ~ 24x excluding 14x without doing any physical modification on the CPU bridges.
The max vcore on 8RDA is 2.2v
The max vdmm on 8RDA is 2.9v
The max agp voltage on 8RDA is 2.0v
the max FSB on 8RDA is 250mhz
8RDA does have PCI/AGP lock, say so on Epox website.
8RDA is definately capable of running 200mhz FSB if you have the memory good enough to do so (Corsair XMS PC3500C2 and Twinmos PC3200 winbond chip) However, what makes 200mhz FSB happen is the VDD voltage (North Bridge Voltage, NB is also the clock generator)
I did a VDD Mod and now I am running at 219mhz FSB. However, I have active cooling on my North Bridge and MOSFETs (voltage regulators).