B650 + Corsair Vengeance DDR5-6400 64GB: boot loop |
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nixtosay
Newbie Joined: 17 Mar 2024 Status: Offline Points: 155 |
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Posted: 17 Mar 2024 at 6:30am |
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Hi
I have just finished a new PC build using the B650 PG Lightning Mainboard with Corsair's DDR5 64 GB Vengenance (CMK64GX5M2B6400C32). When booting into the BIOS the memory banks are being detected in the A2/B2 slots with their total memory correctly. However, the frequency is stated as 4800 MHz. I was expecting the memory to run at 6400 MHz. So I adjusted the speed accordingly, loaded the detected XMP profile in the submenu, save all changes that come with it and reboot. However, the pc then reboots automatically and I am not able to get back to the BIOS. After a complete power off I can get back to BIOS where the memory again is stated @ 4800 MHz. Am I doing something wrong? What do I need to do in order to run the advertised 6400 MHz? I noticed a lot of different parameters have changed when I loaded the XMP profile - do I need to find these values by myself and adjust? I am by any means not experienced in overclocking and don't intend to. Any help is appreciated. |
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M440
Senior Member Joined: 12 Jul 2023 Status: Offline Points: 3115 |
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update to newest bios, the first memory training takes up to 5 minutes (after the training it boots fast) you reboot the PC before the training ends or the training fails - the motherboard resets the RAM settings to stock 4800mhz, so i would wait that 5 minutes, if it fails training try changing the training options to 'auto' like described here: https://forum.asrock.com/forum_posts.asp?TID=30954&title=solved-b650m-hdv-m2-bios-memory-stability-issues |
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asrock b650m/hdv.m2, ryzen 7700x@85watt
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nixtosay
Newbie Joined: 17 Mar 2024 Status: Offline Points: 155 |
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I am already on the latest version of BIOS.
Maybe I am misunderstanding something: on the main bios screen should the frequency be the one that the RAM is currently running with? Or is that the default/ out of the box speed? Because on the main bios screen it says 4800 MHz. On the profile page the 6400 MHz are set. Also: could you please elaborate about memory training? Is this maybe the process that I am describing as 'boot loop"? The PC reboots automatically multiple times. Thank you for any help. |
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M440
Senior Member Joined: 12 Jul 2023 Status: Offline Points: 3115 |
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asrock b650m/hdv.m2, ryzen 7700x@85watt
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nixtosay
Newbie Joined: 17 Mar 2024 Status: Offline Points: 155 |
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I have just applied the settings as advised. Works like a charm.
It is reading just as you are describing: DDR5-4800-32GB @6400MHz Thank you M440 As this system has just been setup and everything is out of the box, is there something that you would recommend taking a closer look at? Or certain settings that I should apply? I greatly appreciate your help. |
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M440
Senior Member Joined: 12 Jul 2023 Status: Offline Points: 3115 |
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thank you for letting us know,
Nothing if you plan to run the setup at stock. If you like tuning you can undervolt the CPU (PBO2 Curve Optimizer). |
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asrock b650m/hdv.m2, ryzen 7700x@85watt
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nixtosay
Newbie Joined: 17 Mar 2024 Status: Offline Points: 155 |
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Hi M440,
I kind of need to revert what I have said previously. As described earlier, I was able to set the memory clock speed to 6400 MHz. As I am running Debian Sid 6.7.9-amd64 with an NVidia 4070 Super using driver version 550.54.14 the system became very unstable. I noticed first by not being able to start any games using Steam. In addition, I booted into memtest86+ and was confronted with failures half way through the test. Tried stepping down with the frequency still following your guide until I was able to run the system stable at 5800 MHz. Will this be improved with upcoming BIOS updates? Can I report this to ASRock directly to have a look into this? Or are you part of ASRock's team? |
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M440
Senior Member Joined: 12 Jul 2023 Status: Offline Points: 3115 |
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have you applied the xmp/expo profile? i use arch btw |
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asrock b650m/hdv.m2, ryzen 7700x@85watt
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biosbandit
Newbie Joined: 16 Mar 2021 Status: Offline Points: 80 |
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I am about to purchase exactly the same memory, 2x32GB sticks for a B650i (ITX) AsRock system.
Which CPU are you using? Have you had any luck in isolating this issue? Often memory issues are easily fixed with simply a tiny bit more voltage. These seem to be 1.1V modules, it may be worth going to 1.15 volts for example. However, this is old information from long ago, I am unsure if it's still valid. |
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nixtosay
Newbie Joined: 17 Mar 2024 Status: Offline Points: 155 |
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Hi biosbandit, The state as of now is that I was able to have a stable system going @ 5800 MHz as of now. Please keep in mind that I have absolutely no clue about voltages and the different settings I could apply in that regard. So chances are that running them at the suggested clock speed of 6400 MHz is possible. I just have not figured it out - yet. In Debian Sid a dmidecode provides me with this information: Handle 0x0015, DMI type 17, 92 bytes Memory Device Array Handle: 0x0010 Error Information Handle: 0x0014 Total Width: 64 bits Data Width: 64 bits Size: 32 GB Form Factor: DIMM Set: None Locator: DIMM 1 Bank Locator: P0 CHANNEL A Type: DDR5 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 4800 MT/s Manufacturer: Unknown Serial Number: 00000000 Asset Tag: Not Specified Part Number: CMK64GX5M2B6400C32 Rank: 2 Configured Memory Speed: 5800 MT/s Minimum Voltage: 1.1 V Maximum Voltage: 1.1 V Configured Voltage: 1.1 V Memory Technology: DRAM Memory Operating Mode Capability: Volatile memory Firmware Version: Unknown Module Manufacturer ID: Bank 3, Hex 0x9E Module Product ID: Unknown Memory Subsystem Controller Manufacturer ID: Unknown Memory Subsystem Controller Product ID: Unknown Non-Volatile Size: None Volatile Size: 32 GB Cache Size: None Logical Size: None Handle 0x001A, DMI type 17, 92 bytes Memory Device Array Handle: 0x0010 Error Information Handle: 0x0019 Total Width: 64 bits Data Width: 64 bits Size: 32 GB Form Factor: DIMM Set: None Locator: DIMM 1 Bank Locator: P0 CHANNEL B Type: DDR5 Type Detail: Synchronous Unbuffered (Unregistered) Speed: 4800 MT/s Manufacturer: Unknown Serial Number: 00000000 Asset Tag: Not Specified Part Number: CMK64GX5M2B6400C32 Rank: 2 Configured Memory Speed: 5800 MT/s Minimum Voltage: 1.1 V Maximum Voltage: 1.1 V Configured Voltage: 1.1 V Memory Technology: DRAM Memory Operating Mode Capability: Volatile memory Firmware Version: Unknown Module Manufacturer ID: Bank 3, Hex 0x9E Module Product ID: Unknown Memory Subsystem Controller Manufacturer ID: Unknown Memory Subsystem Controller Product ID: Unknown Non-Volatile Size: None Volatile Size: 32 GB Cache Size: None Logical Size: None I would love to learn more about what could be done to improve stability while going further towards the 6400 MHz. |
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