PC will not boot with 4 ram sticks

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Honorforall

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Feb 10, 2019
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I have a Z370 Aorus ultra gaming 2.0 motherboard with 2 8GB Corsair Vengeance rgb pro Ram installed in the 4 and 2 slots (channel A). Everything boots and the pc has been running fine for months. I recently purchased 2 more 8GB Ram stick that are identical to the ones installed. I installed them in the remaining slots, 3 and 1 (channel b), but the pc will not boot. It powers up for about 30 seconds, but the powers down and repeats. The monitor never turns on. All the RGB on the ram sticks work and are in sync. Please help.
 

Honorforall

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Feb 10, 2019
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Yes. The pc only boots with 2 ram sticks inserted. All 4 work as ive tested each one alone. and all slots work as I've also tested that.
 

crjdriver

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Jan 2, 2001
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40,805
What bios are you running? There are bios updates that address boot issues.
Next is your exact ram on the approved or qvl list on the support page for that board?
Do you have xmp enabled and if so, what happens when you return the speed to stock ie 2133?
 

Honorforall

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Feb 10, 2019
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I'm Using the F2 bios version from 2018/03/09. I've thought about updating the bios, but I know that it can be risky so I wanted to try other things first. My exact ram is on the approved list and it still won't boot with xmp or default 2133. Both work with just 2 sticks installed.
 
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