Level 20 GT Plus Build - Ebony bliss in System Builds Posted May 11 · Report reply Its been awhile since I updated this, a bunch of problems and a major side project has kept me busy. Seems that even with the 25Amp DC to DC converter the peak currents with all RGB hitting white overloaded it and then the controllers had a hissy fit. As to the TT controllers I've had a good play with them and decided they need to be redesigned. Internally the uP in the controller is powered by a 3.3 volt low voltage dropout linear regulator and this gets its power from the 5 volt rail of the PC. It's just not good enough the power onthe 5v rail us not great at best on a cheap power supply and with the power used by the RGB ligting can fluctuate alot, there is just not enough headroom to play with. An alternative 3.3 volt supply derived by a buck converter will work much better. 12volt to 5volt 50Amp DC-DC converter bit of overkill but why not, there werent many other choices and I wasnt changing it again. Sprayed black of course, the sticker hiding a paint run. Modified the distribution board and added voltage readouts for both 12v and 5v. The 5v power cabling from the converter is 4 conductors of 65/0.3 to redice voltage drop at high currents. The 4 pin 12v in feeds the fans 12v and enables the converter. The converter has a 6pin 12v power feed directly from the supplies PCIe power outputs. Problem now is the DC - DC converter is starting up to slow and locking up the TT controllers. Working on it at the moment but plan to run all the microcontrollers in the TT controllers from a central 3.3v converter from the 12v rail to guarantee no issues that's why one controller is hanging loose.