[HELP! Instant Crash On FPU stress Test (Asus Rampage VI Apex + i9-7940X)]

Tried, the scenario remains : ( 

I've updated to the latest version for both bios and aida64

guess something wrong with my volt setting? any idea ?

Thank you!

[HELP! Instant Crash On FPU stress Test (Asus Rampage VI Apex + i9-7940X)]

Hi, I've met a issue with the FPU stress test, the system would crash instantly when I click the "Start" buttom

it was ok to run a solo CPU stress test over 2 hour, but I just dont understand why it went wrong when conducting the FPU test. Any Ideas?

many thanks!

I've attached a AIDA64 report of my mobo

 

my build 

CPU:7940x (1.15volt, OC 4.5ghz)

MOBO:R6A

RAM:Gskill 8G*4 4266mhz c17 (I set the frequency at 2133)

PSU:AX1500i

Report.txt