X470 Taichi - 1.5V DDR4 crash
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=10844
Printed Date: 27 Jul 2025 at 8:00pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: X470 Taichi - 1.5V DDR4 crash
Posted By: ByReaL
Subject: X470 Taichi - 1.5V DDR4 crash
Date Posted: 06 Feb 2019 at 3:32am
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reset bios, everything factory defaults set in bios DDR4 voltage to 1.45V or 1.5V (no other change) windows fails to boot i get blue screens. any idea ? bios version 2.0 DDR4 memory Samsung b-die 2x16G same memory sticks in a different motherboard work fine at 1.5V and over just to clarify, i don't load XMP or any other setting, the one and only change is the DDR4 voltage and that alone by itself is causing big instability 1.4V works tested stable, 1.45V and over gets blue screen |
Replies:
Posted By: Ray62
Date Posted: 06 Feb 2019 at 5:03am
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Did you measure the real DRAM voltage with both motherboards? Is the working motherboard also an AM4 board and used the same CPU? The IMC of each CPU can behave different regarding those limits! ------------- Asrock Fatal1ty X370 Professional Gaming Offline Under test: MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE |
Posted By: ByReaL
Date Posted: 06 Feb 2019 at 5:15am
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i'll measure and come back but this is irrelevant but increasing just the DDR4 voltage to 1.6V-2.0V why would cause any instability ? if i set 1.5V and motherboard is providing less like i said at 1.2V to 1.4V is rock solid. if i set it to 1.5V and actually it is more, b-die can take even 2V, and the memory sticks work fine at higher voltages like i said (teste don teh x299) so it's not the memory sticks. the other motherboard is a X299 Intel different brand, make, something i know works and i use to test to see each memory kit how high it can go. why would the IMC behave differently when the frequency , IMC voltage ... are left unchanged, only the DDR4 memory stick voltage is changed ?(i know there is a termination voltage that is usually DDR4 voltage/2 that has some impact but that is left to auto, and at 1.5V/2 = 750mv for termination voltage that is still in within what AM4 platform can do) now is either the CPU or the motherboard (ram is not the issue for sure) and since i dont change frequency or anything else, i'm inclined to blame the motherboard for not doing proper "auto". |
Posted By: Ray62
Date Posted: 06 Feb 2019 at 5:34am
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Maybe the SOC voltage is too low on that high DRAM voltage and not handled the right way on AUTO settings. But anyway, why using such high voltages? Even on, say maybe reachable 3600Mhz with Ryzen, 1.4V should be enough! And i think, you should post your finding at overclock dot net. ------------- Asrock Fatal1ty X370 Professional Gaming Offline Under test: MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE |
Posted By: ByReaL
Date Posted: 12 Feb 2019 at 3:47am
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can anyone, reproduce the problem? will it be possible for anyone to try set bios to factory defaults set DDR4 voltage to 1.5V (absolutely no other change) and see if windows is stable (everything else to auto, memory leave it to 2133 JDEC) also can anyone run stable 1.5V+ and what other settings have been made ? to make it stable. |
Posted By: gizmic
Date Posted: 12 Feb 2019 at 1:33pm
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booted just fine @1.5v and reverted back to my settings ------------- 
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Posted By: ByReaL
Date Posted: 12 Feb 2019 at 4:19pm
thank you very much, maybe it is the CPU and not the MB i see you have a 2700X i have a 2600, i'll try see if i can barrow a 2700x to try anyone else can try please the 1.5V setting? (maybe somebody with x470 taichi non ultimate bios 2.0 and a 2600) |
gizmic wrote:Posted By: ByReaL
Date Posted: 13 Feb 2019 at 4:22pm
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i was able to get my hands on a 2700X CPU, tried same thing, set DDR4 voltage 1.4V (reported by BIOS is ~1.43V) and everything works fine i set that DDR4 voltage to 1.45 or 1.5V and windows gives blue screen right away |
Posted By: ByReaL
Date Posted: 13 Feb 2019 at 5:12pm
any recommended reading point on the motherboard ? bios reports 1.43 for 1.4V set or 1.53V for 1.5V set. i have a multi meter and an oscilloscope i just dont see any debug, or measuring points on the board, i may have to read of a component but i dont want o short something with my shaky hands. anyway any suggestion where to measure it on the actual board ? |
Posted By: gizmic
Date Posted: 14 Feb 2019 at 11:38pm
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what speed are you trying to hit at those volts anyway -------------
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Posted By: ByReaL
Date Posted: 15 Feb 2019 at 12:19am
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It?™s more about timings not speed I run now 3000cl14-15-16-16-32 @1.35v nothing impressive At 1.4V my sticks cannot do better but at 1.5v I know I can go to 3200 and lower some timings. Is not like the difference will be noticed in day to day use anyway , but is annoying that increasing this voltage makes the pc super unstable , when It is supposed to gain you stability. I just want some confirmation from other people that for them works before I RMA the board, to me it looks like a bios bug, but if it works for others maybe my board has a real issue. |
Posted By: gizmic
Date Posted: 15 Feb 2019 at 10:22am
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i'm currently at 1.43. my 3200 settings should be only 1.36 to 1.37 shouldnt be the board as its just delivering power to the cpu which then is controlled in the cpu -------------
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Posted By: ByReaL
Date Posted: 15 Feb 2019 at 11:43am
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would you be willing to try 1.5V and boot into windows? I tried 2CPUs a 2600 and a 2700X so I don?™t think it?™s the CPU especially since both behave identically no variation. |
Posted By: gizmic
Date Posted: 15 Feb 2019 at 12:11pm
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i did booted into windows when i tested for you previously -------------
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Posted By: ByReaL
Date Posted: 15 Feb 2019 at 3:20pm
sorry about that, yes it worked for you |
Posted By: ByReaL
Date Posted: 24 Mar 2019 at 3:54am
| anyone else could give it a try ? please, any voltage past 1.5V whatever you feel comfortable with |