[SOLVED] MB suddenly boots only with ANY of 3 RAM Sticks Installed instead of 4 !!!!!

[megz111]

Motherboard : Gigabyte X99 Designare ex
CPU : i7 6800K
Memory : 4*16 Corsair Vengeance 3200 DDR4

Suddenly BIOS doesnt start and keep re-booting , it boots only when i remove "ANY" stick of the 4 RAMS


What i tried to do:

• change the slots for each one but nothing happen
• removed the motherboard battery and put it again after 5 min

 

[geofelt]

What might have changed since all was well?

Are all 4 sticks from the same matched kit?
If not, that could be your problem.

Test each stick, one at a time to verify that each is individually good.
Test at default 2400 speed.

Run memtest86.
It boots from a usb stick and does not use windows.
You can download the free edition here:
https://www.memtest86.com/download.htm

If you can run a full pass with NO errors, your ram should be ok.

When you removed the cmos battery, you reset the bios to default.
To run at 3200 speed, you need to implement a xmp profile.
In essence, this overclocks ram to get 3200 speed.
You might find that if you increase the ram voltage a bit past the xmp profile specs you can get it to work.

Lastly, check to see if your motherboard has a bios update that addresses ram issues.