Hi,
I have an really very weired issue with ASUS ROG STRIX B550-I GAMING.
Some NVME (PCIe) SSD's are not working correctly in the second M.2 socket. An example of it is the SAMSUNG SSD980 1TB NVME SSD.
Some other NVME (I have only smaller ones) disk do work without any problem, also SAMSUNG disks, eg an MZVPV128HDGM-0000.
The behaviour is also really very strange, i.e.:
I have aslo checked all the physical connections from the chipset and all other signals to the M.2_2 socket, electrically I can't find any issue, all connections are there, no shorts, etc.
Also checked the 3,3V power line to the M.2_2 socket with scope and DMM, voltage correct, no instabilities of the voltage.
Replaced also the M.2 socket itself, as I supsected there might be a contacting issue - no change.
Tried also with several processors, eg. Ryzen 7 4700G, Ryzen 5 5600, Ryzen 3 1200 - no change.
Replaced also several small smd devices around the M.2_2 socket having to do with controlling/powering the M.2 disk, eg. PU3001, PQ4003, PU4003, PQ4006, PQ5002, PQ5004, PQ5005, PMD1, HD2 - no change
Measured all caps around the M.2 socket for shorts, as well as the resisors, all are OK.
My suspicion is that probably the BIOS of the board has a bug, probably there is some glitch on the switch from the BIOS POST to the Windows boot process, and eg. the disk is reported to Windows as SATA not PCIe, maybee, who knows ???
Also maybe the BIOS has a glitch with big SSD disks (the 128MB one works like a charm), not reporting them correctly to Windows.
Another suspicion is that Windows 24H2 does not have the correct drivers, or the Windows NVME drivers have a bug ???
Last suspicion is that maybe some of the M.2_2 socket controll signals need a pull-up or a pull-down resistor which is just missing on this board, as it has been engineered probably before this 1TB Samsung was available, and it will not work just with this 1TB disk, but works with different disks ???
There are some posts on different forums, also for similar ASUS B550 boards, so it seems this issue is not unique, but there are no real solutions there.
I spent 2 days on the issue to no avail, and have no more ideas.
Below the link to the BV - I have seen another post regarding to this boad on BadCaps, so maybe it will be helpfull there also.
ANY SUGGESTIONS ARE WELCOME !
Boardview link:
https://www.badcaps.net/forum/troubl...51#post3579451
.
I have an really very weired issue with ASUS ROG STRIX B550-I GAMING.
Some NVME (PCIe) SSD's are not working correctly in the second M.2 socket. An example of it is the SAMSUNG SSD980 1TB NVME SSD.
Some other NVME (I have only smaller ones) disk do work without any problem, also SAMSUNG disks, eg an MZVPV128HDGM-0000.
The behaviour is also really very strange, i.e.:
- The disk shows always up in BIOS - so it is recognized, so far so good
- POST-ing with this disk with fresh Windows 24H2 installation (done in the M.2_1 socket) in the M.2_2 socket leads to displaying first "autochk program not found - skipping AUTOCHECK" and next after few seconds BSOD with "INACCESSIBLE BOOT DEVICE" - so the POST process finalizes, but after starting to load Windows (rotating circle) the disk disappears and is not visible to the Windows boot
- Trying to do a fresh Windows install on the 1TB Samsung disk in the M.2_2 socket from USB works until the screen with the selection of the disks/partitions on which the installation has to be done - the disk is not visible there, so a similar bahaviour like during booting windows above - Windows install does not see the disk
- When Windows is booted in M.2_1 with two NVME disks (M.2_1 - a 500GB disk with Windows installation, M.2_2 - the 1TB Samsung disk) the board boots correctly, but the M.2_2 disk is visible only in diskmanagment (diskmgmt.msc). After assigning a letter to the disk it shows up in explorer, but the disk can't be opened - a message appears: "A device which does not exist was specified"
- But, the most weired thing I discovered is when I do hibernate/sleep and then start the board from hibernation/sleep, the disk can be opened in explorer normally after some time, or if I open it from diskmanagement, also any copy/delete files works then w/o a problem
- The 1TB is good as it works on any other boards and in M.2_1 w/o a problem
- I have experimented with all relevant BIOS settings, eg. Secure Boot, UEFI or OTHER OS, CSM on/off, PCI Bifurbication settings, oldest and newest BIOS version, to no avail
- Disk is formatted as GTP, tried also a clean formatted disk, as well an disk with fresh Windows installation, have also formatted/installed it on another mobo, it is in GPT format so correct, none of this helped
I have aslo checked all the physical connections from the chipset and all other signals to the M.2_2 socket, electrically I can't find any issue, all connections are there, no shorts, etc.
Also checked the 3,3V power line to the M.2_2 socket with scope and DMM, voltage correct, no instabilities of the voltage.
Replaced also the M.2 socket itself, as I supsected there might be a contacting issue - no change.
Tried also with several processors, eg. Ryzen 7 4700G, Ryzen 5 5600, Ryzen 3 1200 - no change.
Replaced also several small smd devices around the M.2_2 socket having to do with controlling/powering the M.2 disk, eg. PU3001, PQ4003, PU4003, PQ4006, PQ5002, PQ5004, PQ5005, PMD1, HD2 - no change
Measured all caps around the M.2 socket for shorts, as well as the resisors, all are OK.
My suspicion is that probably the BIOS of the board has a bug, probably there is some glitch on the switch from the BIOS POST to the Windows boot process, and eg. the disk is reported to Windows as SATA not PCIe, maybee, who knows ???
Also maybe the BIOS has a glitch with big SSD disks (the 128MB one works like a charm), not reporting them correctly to Windows.
Another suspicion is that Windows 24H2 does not have the correct drivers, or the Windows NVME drivers have a bug ???
Last suspicion is that maybe some of the M.2_2 socket controll signals need a pull-up or a pull-down resistor which is just missing on this board, as it has been engineered probably before this 1TB Samsung was available, and it will not work just with this 1TB disk, but works with different disks ???
There are some posts on different forums, also for similar ASUS B550 boards, so it seems this issue is not unique, but there are no real solutions there.
I spent 2 days on the issue to no avail, and have no more ideas.
Below the link to the BV - I have seen another post regarding to this boad on BadCaps, so maybe it will be helpfull there also.
ANY SUGGESTIONS ARE WELCOME !
Boardview link:
https://www.badcaps.net/forum/troubl...51#post3579451
.
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