X399 Taichi C0 Fault

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 oxijex wrote:

Ok so, for some reason... it started working...
I took the Cmos battery out... removed the cpu for the 10th time and replaced it... started it with only the ram and then i got GPU code.. so put GPU in and got BIOS... the m2 was a bit dicky but it worked in slot 3.... anyway... can't really say what it's issue was.. It's working now.. From such a really cool way to install a CPU it turned into a nightmare build :(

I'm glad its working for you now. But imagine our situation. All we have to go on is a few sentences of description, while you have the entire PC to work with. If we don't see an obvious fix in the description, what else can we do but ask more questions?

In your case, as we see sometimes, the PC starts working, and the reason is a mystery to the user that can actually try various things with it. What usually happens is one or more of the things done with the hardware, among several things done over time, was the fix. But since multiple things were changed or tried, the true fix gets lost in all the activity. What PC builder hasn't experienced this?

You may have an AX1200i, but does that automatically mean that both the four and eight pin CPU power cables were connected to the board? Do you know how many times we go through pages of posts in a thread, only to eventually learn the single 4/8 pin CPU power cable used with most systems was not connected? All too many. 

In your case I forgot to add the usual, "... sorry to ask but do you have the CPU power cables connected?". As I said in my first post, the C0 POST code is a very early POST test failure, usually meaning a problem with the CPU. For an X399 system, that could easily be a missing second CPU power cable. In your situation, it might have been the mounting of the CPU, but since we cannot see or touch that PC, how can we know that?

Asking about other components in a build, if nothing else, keeps the conversation going. Most of the time in the responses we get additional or new information. That helps us help you. 

X399 is a new platform that we don't have any experience with yet, so we don't know yet what all the unique issues it has that we can suggest checking into. We are starting to see issues caused by the unique CPU mounting system, and we now know to suggest remounting the CPU as a potential fix.