NVMe windows 10 boot partition not detected

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   I am upgrading from my currently working 6y old system to a new one.

My plan is to use new components for the new system, but use the NVMe drive from my old system to not reinstall windows.
I used this approach successfully in the past without issues however it was from asrock + Intel Cpu -> other MBBrand + Intel CPU

Right now, the new machine detects the nvme drive in bios but is not booting from it. I cant select is as boot option. The nvme drive however works perfectly fine in the old system without issues.

specs:
old system  ->   new system
Asrock Fatality Z170K4  -> Asrock B650 Riptide (bios v1.28)
Intel i7-6700K   -> AMD Ryzen 7950X3D
16GB DDR4      ->  32GB DDR5

The 4 post status LEDs are off, so cpu+ ram seem to be fine.
GPU is not installed yet (since the nvme slot is under it)

I do have 2 nvme drives, both have the same issue: both work fine and boot up on the old system (asrock+intel) but dont boot on the new system (Asrock+AMD).

Can my plan work out or do I really need to reinstall windows?

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MickStacko Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Aug 2023 Status: Offline Points: 35	Post Options Post Reply Quote MickStacko Report Post Thanks(0) Quote Reply Topic: NVMe windows 10 boot partition not detected Posted: 12 Aug 2023 at 4:23pm
	I am upgrading from my currently working 6y old system to a new one. My plan is to use new components for the new system, but use the NVMe drive from my old system to not reinstall windows. I used this approach successfully in the past without issues however it was from asrock + Intel Cpu -> other MBBrand + Intel CPU Right now, the new machine detects the nvme drive in bios but is not booting from it. I cant select is as boot option. The nvme drive however works perfectly fine in the old system without issues. specs: old system -> new system Asrock Fatality Z170K4 -> Asrock B650 Riptide (bios v1.28) Intel i7-6700K -> AMD Ryzen 7950X3D 16GB DDR4 -> 32GB DDR5 The 4 post status LEDs are off, so cpu+ ram seem to be fine. GPU is not installed yet (since the nvme slot is under it) I do have 2 nvme drives, both have the same issue: both work fine and boot up on the old system (asrock+intel) but dont boot on the new system (Asrock+AMD). Can my plan work out or do I really need to reinstall windows?

MickStacko Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Aug 2023 Status: Offline Points: 35	Post Options Post Reply Quote MickStacko Report Post Thanks(0) Quote Reply Posted: 12 Aug 2023 at 11:19pm
	Solved. Turns out the nvme drive partition had still MBR instead of GPT. For some reason I was sure it had GPT. Anyone else dealing with this issue, the fix is less than 5 minutes, see here https://learn.microsoft.com/en-us/windows/deployment/mbr-to-gpt This way i did not need to reinstall windows or deal with licensing. Pro tip: If first step fails, shrink your main partition by 200 MB for new partition.

M440 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 12 Jul 2023 Status: Offline Points: 2035	Post Options Post Reply Quote M440 Report Post Thanks(0) Quote Reply Posted: 13 Aug 2023 at 4:12am
	you need an EFI partition with startup files, don't you?
	asrock b650m/hdv.m2, ryzen 7700x@85watt