I posted this on another thread but figured I should probably post it here too since I have solved the "getting stuck on white" problem. The problem of 1903 not posting with my new RAM is still an ongoing issue but the white light issue has been fully rectified as I will describe below.
Hey, just want to let everyone know that I've solved part of the problem I was having. I disabled the CSM with 1802 and it started getting stuck on white, but still booting, with the monitor coming on only when it got to the desktop, just like before with the old RAM on 1903. This happened with the new RAM on 1802 for the first time only after disabling the CSM. I realize now that I had disabled the CSM with 1903 on the old RAM as well, trying to get Rebar to work.
I figured out that the problem has to do with how long I wait after initially providing power to the PSU and mobo. With the CSM enabled I can push the front power button on my PC immediately after first supplying power to the board and it boots normally every time, but for some reason when the CSM is disabled I have to wait somewhere between 5-30 seconds before hitting the front power button or it gets stuck on white every time.
Thats why rebooting would sort out the problem, because it had already been supplied with power for much longer than 5-30 seconds.
I've tried this many times now with 1802 and have basically confirmed that if I wait the 5-30 seconds after first supplying power to the board before powering the machine on fully, it boots normally every time with the CSM disabled. If I power on the machine immediately after supplying power to the board without waiting the 5-30 seconds it gets stuck on white every time with the CSM disabled. If the CSM is enabled it will boot normally every time regardless of how quickly I power on after first giving power to the board through the PSU.
That said, this does not explain why 1903 will not post after a fresh install with this new RAM.
I still have not yet tried the latest BIOS myself.
EDIT: It also doesn't explain why I was not able to set the TPM to discrete with 1903. Every time I tried to set it to discrete it would fail to boot and then automatically revert back to firmware. I am still on 1802 and have not tried the latest bios. At this point, I just want to relax and play some games. It sucks that I can't enable rebar with this current bios so I will eventually try the new bios, but for now I'm just enjoying actually using my PC and not having to constantly troubleshoot issues.
