DDR5 RAM Expo - NOT BOOTING
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=89485
Printed Date: 11 Nov 2025 at 1:20am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: DDR5 RAM Expo - NOT BOOTING
Posted By: baranozan
Subject: DDR5 RAM Expo - NOT BOOTING
Date Posted: 07 Jan 2025 at 8:13pm
|
Hi, My System Parts: Asrock A620M-HDV/M.2 GOODRAM IRDM 16GB 6000MHz CL30 RAM (Single RAM 1x16) Ryzen 5 7500f Rtx 4070S 650W 80+ PSU Currently I have updated BIOS to 3.15 (latest) and I can use my computer with default settings. When I set the RAM configuration as EXPO or XMP profile and restart the pc, it works fine. However, the PC does not boot day after. CPU and DRAM leds remains red for forever. The only way that I can open the pc is to cut the electricity and start again. Then, everything looks fine. I have to do same in every morning. I have same issue for BIOS version 3.10. Please help me to figure it out. |
Replies:
Posted By: NDRE28
Date Posted: 08 Jan 2025 at 5:03am
Hello! The maximum RAM speed supported by your CPU, officially, is: DDR5-5200. There is no guarantee that RAM kits with higher speeds will run reliably on your system. If your RAM kit has a slower profile (DDR5-5200, or DDR5-5600) load that profile, and see if the problem gets solved. If you don't have a lower EXPO profile, then load the profile that you already use, but search in the BIOS menu for "OC Tweaker" and look for the "DRAM Profile" tab. There, you can load the DDR5-5200 profile, which will change only the DRAM speed, while your timings & voltage remains as set before. See if this setting solves the issue. NOTE: ?¢Stress test your system to make sure that it's stable! ?¢Download the free tool, MemTest86, put it on a USB flash drive and run it until it says "Pass"! (It takes a few hours). ?¢Also, download Cinebench 2024 and let it run until it finishes! If both of these pass, you'll, probably, no longer run into RAM related issues. I hope this helps... |
baranozan wrote:Posted By: baranozan
Date Posted: 08 Jan 2025 at 2:39pm
|
Hi, When I use default settings in BIOS, it works at 4800MHz 38-38-38-77 1.10V There are only 3 option in OC Tweaker > DRAM Profile Configuration, which are - DDR5-4800 38-38-38-77 1.10V - XMP1-6000 30-36-36-76 1.35V - EXPO-6000 30-36-36-76 1.35V Also, when I check the motherboard page ( https://www.asrock.com/MB/AMD/A620M-HDVM.2/index.asp#MemoryRAP" rel="nofollow - https://www.asrock.com/MB/AMD/A620M-HDVM.2/index.asp#MemoryRAP ) it says 2 x DDR5 DIMMs Supports Dual Channel, up to 6400+ (OC). if you re sure about the DDR5-5200 Mhz max offical speed, How can I set it manualy. There is no option in profice setting. Also, I would like to use 30-36-36-76 for the other values (tCL, tRCD, tRP, tRAS). The last but not least, may be I am not correctly overclocking the RAM. Is there any guide for that? DRAM performance mode is AMD AGESA Default (the other options are Competitive and Aggressive. Performance Boost -> Auto (could be Cinebench_profile_1 and 2) Memory Context Restore -> Disable or Enable DFE Read Training -> Auto (Disable, Enalbe) Gear Down Mode -> Auto (Disable, Enalbe) |
Posted By: NDRE28
Date Posted: 09 Jan 2025 at 1:55am
|
The steps in the BIOS of the X670E Taichi are these: 1. OC Tweaker 2. DRAM Profile Configuration <Enter> 3. DRAM Profile Setting <Enter> 4. Select a Profile (for example: EXPO 6000 30-36-36-80 1.4V) <Enter> 5. F10 (Save) 6. Restart 7. OC Tweaker 8. DRAM Frequency <Enter> 9. Select a frequency (for example DDR5-5800) <Enter> 10. F10 (Save) / PC Restarts NOTE: The RAM kit will run with the timings & voltage of the EXPO profile, but with the DRAM frequency at 5800MT/s. I hope this helps. |
Posted By: baranozan
Date Posted: 09 Jan 2025 at 5:41am
|
I will try your steps and let you know the results. How can I get the correct information for the asrock a620m-hdv/m.2? in official page, it says "2 x DDR5 DIMMs Supports Dual Channel, up to 6400+ (OC)" However, you said the stable max clock frequency is DDR5-5200Mhz. |
Posted By: NDRE28
Date Posted: 09 Jan 2025 at 8:14am
Hello again! EXPO & XMP are overclocking profiles. No overclock is guaranteed! That's why it says: "Up to 6400+ OC". With other words, the manufacturer of the CPU only guaranteed 2x DDR5-5200, or 4x DDR5-3600, but usually (if you are lucky) you can achieve higher frequencies than that. Unfortunately, that's the other side of the marketing coin! You pay a lot for fast RAM & a motherboard that support those speeds, only to discover that your CPU is holding you back! |
Posted By: baranozan
Date Posted: 28 Jan 2025 at 9:15pm
|
Hi, Actually, you may right about the CPUs but it is same for almost all CPU models. They supports up to 5200Mhz. However, many users can use expo or xmp profiles for those CPUs. After 1 month experience, I cannot understand why the issue (mentioned above messages) depends on the time. I have started to use system as you said. Expo profile is selected and RAM freq is set to 5200Mhz. it looks like solve the issue until today. I didn't plug in the computer since last week (around 4 days) and same issue comes up again. Do you have any comments that the issue is related with time? |
Posted By: NDRE28
Date Posted: 28 Jan 2025 at 9:22pm
Hi again! I am sorry to hear that your problem is back. Are you using any form of CPU overclock? |
Posted By: vrock442
Date Posted: 19 Sep 2025 at 4:48am
|
This thread showed up in google search. I have a new PC with similar issue. When setting up EXPO profile in BIOS OC tweak everything works fine until next boot. MCR and Power Down are ENABLED as recommended. The problem is after the PC has been turned off for a while, POST fails. To fix it, I turn the power off and on again, then memory training is done and POST is successful. Maybe there is a fault with CPU, motherboard or RAM kit? Or perhaps CMOS battery is dying or the PSU is faulty? Or there is voltage setting in BIOS that should be set differently? But the system is stable and passes OCCT stability tests apart from failing to POST after long power off. Motherboard: asrock 650i lightning wifi CPU: Ryzen 7600 RAM: Crucial Pro CP2K16G60C36U5B DDR5 RAM Kit (2x16GB) 6000MHz CL36 |
Posted By: NDRE28
Date Posted: 19 Sep 2025 at 12:43pm
|
Hi! Are you on the latest BIOS version? If not, please update the BIOS, then re-test your PC! |
Posted By: vrock442
Date Posted: 19 Sep 2025 at 1:50pm
|
Yes, BIOS is latest version currently 3.40. Only with Memory Context Restore DISABLED the motherboard can POST. |
Posted By: NDRE28
Date Posted: 20 Sep 2025 at 4:39pm
|
Hi! Please try the following: Enter the BIOS menu, load the EXPO profile DDR5-6000. Then, go to DRAM speed and select DDR5-5600. This way, the RAM will work with the EXPO voltage & timings, and only the DRAM speed will be a bit lower. Save changes & exit BIOS. Then, test the system with MemTest86 (it will take a few hours to complete). You'll need to create a bootable USB stick for it, and boot with it. For context: Your CPU, just like mine (R9 9950X), is guaranteed to run with DDR5-5600! Going above that speed is not a given! It's all about the silicone lottery: Some CPUs can hit higher frequencies than the official spec. Stability is more important than speed! |
Posted By: neolz75
Date Posted: 20 Sep 2025 at 11:42pm
| clear CMOS and then try once expo settings recommended whether it gets stable or not ? |
Posted By: vrock442
Date Posted: 21 Sep 2025 at 6:47pm
|
I have tried all viable solutions - different RAM speeds, Default RAM speed without OC, MCR Enabled/Disabled, CPU voltage settings, reseating RAM sticks etc. I do not have time to test all possible settings outside the scope of regular troubleshooting. Almost always cold boot hangs, needs a restart and even then it is not guaranteed to POST. Warm boot is fine. Yesterday I installed a different RAM kit, it works fine so far, zero boot issues on several tests. I need more time to test cold boot routines to confirm it is working. It is very likely I got a faulty RAM kit, or it is borderline not compatible with the CPU IMC or motherboard. |