New Member AMD Motherboard Thread

**Subject:** X570S PG Riptide - DRAM Voltage Locked at ~1.15V? XMP Fails Across Multiple BIOS Versions and Memory Kits

Hi everyone,

I'm hoping someone has seen this before.

**Hardware**

* ASRock X570S PG Riptide
* Ryzen 9 5900XT
* BIOS versions tested: 2.20, 5.40, 5.50, 5.60, 5.80
* Multiple DDR4 kits tested:

* Kingston HyperX Fury 2?32GB DDR4-3200 CL16
* Corsair Vengeance LPX 2?32GB DDR4-3200 CL16
* Corsair Vengeance LPX 2?8GB DDR4-3600

**Problem**

The board appears to ignore any DRAM voltage setting above JEDEC voltage.

Examples:

* Manual DRAM Voltage = 1.35V ??board still reports ~1.15V
* XMP Profile enabled ??POST fails and memory falls back to JEDEC
* Manual DRAM frequency = 3200 with Auto timings ??boots successfully, but only because timings relax significantly (around CL22) while DRAM voltage remains ~1.15V
* 3600 MT/s can also train with very loose timings, but VDIMM never increases.

The interesting part is that memory frequency changes work, but DRAM voltage does not.

**Voltage readings**

All of the following report essentially the same value:

* BIOS Hardware Monitor: ~1.157V
* AIDA64: 1.152V
* HWiNFO: approximately 1.15V

Changing DRAM Voltage in BIOS from 1.20V to 1.35V (or higher) has no effect on the reported voltage.

**Things I've already tried**

* Cleared CMOS
* Loaded UEFI defaults
* Manually set only DRAM Voltage (left everything else Auto)
* Multiple BIOS versions (2.20 through 5.80)
* Three completely different memory kits
* Single-rank and dual-rank DIMMs
* 64GB and 128GB configurations

Everything behaves identically.

At this point I'm trying to determine whether:

1. this is a known BIOS issue,
2. there is a hidden setting I'm overlooking, or
3. the DRAM voltage regulator on the motherboard may be faulty.

Has anyone experienced something similar on an X570S PG Riptide or another ASRock AM4 board?

Any suggestions would be greatly appreciated.
I sent a support message to asrock about 10 days ago but havent heard back.
Thank you

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Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 40033	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 27 May 2026 at 1:23pm
	Welcome to the forums Motherload, I have made a thread for your issue here.


Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 40033	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 05 Jun 2026 at 11:42pm
	Hello and welcome to the forums xyirox. I have made a thread for you here.


Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 40033	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 09 Jun 2026 at 7:00pm
	Welcome to the forums al3ks_a, I have made a thread for your issue here.


Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 40033	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 09 Jun 2026 at 8:32pm
	Welcome to the forums Preytheon, I have made a thread for you here.


Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 40033	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 22 Jun 2026 at 3:50pm
	Hello redblood2, I have made a thread for your issue here.


bacon612 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21 Jun 2026 Status: Offline Points: 15	Post Options Post Reply Quote bacon612 Report Post Thanks(0) Quote Reply Posted: 2 hours 26 minutes ago at 4:37am
	Subject: X570S PG Riptide - DRAM Voltage Locked at ~1.15V? XMP Fails Across Multiple BIOS Versions and Memory Kits Hi everyone, I'm hoping someone has seen this before. Hardware * ASRock X570S PG Riptide * Ryzen 9 5900XT * BIOS versions tested: 2.20, 5.40, 5.50, 5.60, 5.80 * Multiple DDR4 kits tested: * Kingston HyperX Fury 2?32GB DDR4-3200 CL16 * Corsair Vengeance LPX 2?32GB DDR4-3200 CL16 * Corsair Vengeance LPX 2?8GB DDR4-3600 Problem The board appears to ignore any DRAM voltage setting above JEDEC voltage. Examples: * Manual DRAM Voltage = 1.35V ??board still reports ~1.15V * XMP Profile enabled ??POST fails and memory falls back to JEDEC * Manual DRAM frequency = 3200 with Auto timings ??boots successfully, but only because timings relax significantly (around CL22) while DRAM voltage remains ~1.15V * 3600 MT/s can also train with very loose timings, but VDIMM never increases. The interesting part is that memory frequency changes work, but DRAM voltage does not. Voltage readings All of the following report essentially the same value: * BIOS Hardware Monitor: ~1.157V * AIDA64: 1.152V * HWiNFO: approximately 1.15V Changing DRAM Voltage in BIOS from 1.20V to 1.35V (or higher) has no effect on the reported voltage. Things I've already tried * Cleared CMOS * Loaded UEFI defaults * Manually set only DRAM Voltage (left everything else Auto) * Multiple BIOS versions (2.20 through 5.80) * Three completely different memory kits * Single-rank and dual-rank DIMMs * 64GB and 128GB configurations Everything behaves identically. At this point I'm trying to determine whether: 1. this is a known BIOS issue, 2. there is a hidden setting I'm overlooking, or 3. the DRAM voltage regulator on the motherboard may be faulty. Has anyone experienced something similar on an X570S PG Riptide or another ASRock AM4 board? Any suggestions would be greatly appreciated. I sent a support message to asrock about 10 days ago but havent heard back. Thank you