Beep code 1-5-4-2 indicates power failure. What kind of power supply are you using? Do you have the 8-pin CPU power connector connected?
Yes Xeon E3-1245V2 is supported on S1200BTLR. See Tested processor list.
I have a corsair HX750 power supply. Yes I have definately connected the 8 pin CPU power connector.
I am starting to think it may be the system memory. Because I get more results and different post codes after I put in some other memory I had.
Do you know if a South Bridge Intialization Error could still indicate memory problems or power issues?
EDIT: The motherboard requires ECC memory, which is not the case of the below G.Skill model. We'll try with ECC.
EDIT2: I confirm that it was a memory issue. The machine initialize properly now.
We have the same issue, the same error code with the same processor. The RAM is a G.Skill F3-12800CL 10S-8GBXL.