Question Upgrading from i7-2600K to i5-12600K - new mobo boot issues

pcswig13

Member
Dec 12, 2013
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Not sure if I am in the right forum with this, but it does have motherboards in the story.
I am upgrading a friend's old i7-2600K system to a much newer i5-12600K system, complete with a Gigabyte Z790 S WiFi DDR4 mobo, Vengeance LPX DDR4 2x16gb, and Patriot 1TB NVMe drive (PCIe 4.0).
My process was to use Macrium Reflect to clone the old C: drive to the new NVMe, and install the NVMe into the Z790, and get Windows 10 stable, then upgrade to Windows 11 after some burn-in time. However, the "new" system will only boot straight into the BIOS. I do not see any error messages.
It "sees" the NVMe (in the M2A_CPU slot), as I can see it in the BIOS. But it never boots into Windows. I have reviewed all the settings in BIOS so I feel like it should take that next step and load Windows, but it doesn't even try.

Is this too much change for the Windows 10 cloned installation to handle? I am missing something here.
I have done other CPU upgrades before but kept the motherboard and RAM, so those always booted into Windows just fine at initial start up.

Thanks
 

Dr_Web

Junior Member
Sep 3, 2025
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36
Not sure if I am in the right forum with this, but it does have motherboards in the story.
I am upgrading a friend's old i7-2600K system to a much newer i5-12600K system, complete with a Gigabyte Z790 S WiFi DDR4 mobo, Vengeance LPX DDR4 2x16gb, and Patriot 1TB NVMe drive (PCIe 4.0).
My process was to use Macrium Reflect to clone the old C: drive to the new NVMe, and install the NVMe into the Z790, and get Windows 10 stable, then upgrade to Windows 11 after some burn-in time. However, the "new" system will only boot straight into the BIOS. I do not see any error messages.
It "sees" the NVMe (in the M2A_CPU slot), as I can see it in the BIOS. But it never boots into Windows. I have reviewed all the settings in BIOS so I feel like it should take that next step and load Windows, but it doesn't even try.

Is this too much change for the Windows 10 cloned installation to handle? I am missing something here.
I have done other CPU upgrades before but kept the motherboard and RAM, so those always booted into Windows just fine at initial start up.

Thanks
Make sure the new board is set to UEFI boot, not Legacy/CSM.
If the old install was MBR, you may need to convert it to GPT for UEFI.
Sometimes it’s faster to do a fresh Windows install on the new NVMe, then restore files/programs, instead of trying to boot a clone from a totally different generation.

The hardware jump here i7-2600K i5-12600K, SATA SSD, NVMe PCIe 4.0 is just too big for Windows to handle gracefully with a cloned install. A clean install is the most reliable path.
 
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Quintessa

Member
Jun 23, 2025
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Is this too much change for the Windows 10 cloned installation to handle?
The boot chain was broke. The clone still has an MBR bootloader, while your new board is looking for a GPT/UEFI install. That's why you see the drive but it never attempts to boot.
 
Dec 10, 2005
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Wouldn't it be easier and better to just do a fresh install? That just seems like a really big change versus just doing a CPU upgrade on the same platform. And consider putting on W11 considering W10 support ends in 2 months?

Then just manually move over files and let them install programs as they need them.
 

pcswig13

Member
Dec 12, 2013
45
5
71
Good morning all!
I did consider a clean install of Win11 (preferred), but the owner says she is not sure she has all the original medium to reinstall all the programs she had installed on the old build. I will look into Macrium ReDeploy, I was not aware of that, as well as the UEFI boot settings.
I may end up with the clean install and just have her find the install medium.
Thanks to all for the recommendations.
 

Steltek

Diamond Member
Mar 29, 2001
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Good morning all!
I did consider a clean install of Win11 (preferred), but the owner says she is not sure she has all the original medium to reinstall all the programs she had installed on the old build. I will look into Macrium ReDeploy, I was not aware of that, as well as the UEFI boot settings.
I may end up with the clean install and just have her find the install medium.
Thanks to all for the recommendations.

Depending upon what software she has installed, if product activation is involved with any of them she will almost certainly have to have the media anyway.

A major hardware and OS upgrade like that will almost certainly invalidate existing product activations in most cases.

And, if any of it is old Adobe stuff, it may not work even with the media. Adobe has retroactively ended the prior perpetual licenses and removed access to the old activation servers.
 
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