X370 Killer SLI bios 4.50 failed to boot with 64GB

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   I upgrade bios to version 5.10 dated 21 Dec 2018 on the same X370 Killer SLI motherboard.  Again, the system fail to boot.

I have 4x 16GB DDR4 Apacer 2400 installed.  I remove one of the RAM and the system can boot with 3x 16GB ram.  I re-plug RAM and try boot with 4x 16GB, it won't boot.

I go into BIOS setting and change the RAM frequency from Auto (2400Mhz) to 2133MHz.  The system can boot with 4x16GB again.

I am not sure if this the RAM issue or BIOS firmware issue.  The same hardware configuration works with BIOS version 3.50 on 4x16GB 2400MHz but won't work with 5.10.

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ccy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Jan 2018 Status: Offline Points: 7	Post Options Post Reply Quote ccy Report Post Thanks(0) Quote Reply Topic: X370 Killer SLI bios 4.50 failed to boot with 64GB Posted: 14 Jan 2019 at 9:18am
	I upgrade bios to version 5.10 dated 21 Dec 2018 on the same X370 Killer SLI motherboard. Again, the system fail to boot. I have 4x 16GB DDR4 Apacer 2400 installed. I remove one of the RAM and the system can boot with 3x 16GB ram. I re-plug RAM and try boot with 4x 16GB, it won't boot. I go into BIOS setting and change the RAM frequency from Auto (2400Mhz) to 2133MHz. The system can boot with 4x16GB again. I am not sure if this the RAM issue or BIOS firmware issue. The same hardware configuration works with BIOS version 3.50 on 4x16GB 2400MHz but won't work with 5.10.

Icreatin Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Jan 2018 Location: Canada Status: Offline Points: 1	Post Options Post Reply Quote Icreatin Report Post Thanks(0) Quote Reply Posted: 30 Jan 2018 at 10:56pm
	I just updated to 4.50 from 3.50 and now am stuck at the post screen and cannot get into uefi all I can do is restart the system. Changing the ram doesn't matter I just can't get into uefi. System Cpu: A8-9600 Ram: 2x 8g corsair vengeance (a2+b2) Gpu: Gtx 660 Psu: Cs650m Hdd: random SATA drive OS: Win 10 pro

ccy Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Jan 2018 Status: Offline Points: 7	Post Options Post Reply Quote ccy Report Post Thanks(0) Quote Reply Posted: 30 Jan 2018 at 9:19am
	I have a X370 Killer SLI motherboard installed with 4 pcs of Apacer 16GB 2400 RAM. The previous BIOS version was 3.40. The CPU is AMD Ryzen 1700. The system works ok most of the time except a case: The system will hang after working for few weeks. I have no clue yet whether it is software or hardware issue. I upgrade the BIOS to 3.50, the system can boot. I continue upgrade 4.50, the system can't boot. After some trial and error, I remove 2 pcs of RAM from the motherboard, the system can boot again. I plug the 2 pcs RAM back to motherboard, the system can't boot. I downgrade the BIOS to 3.50 with 4 pcs RAM installed, the system can boot and works again. Is this a problem with latest 4.50?