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m.2 slower boot than SSD

Bartmole
By Bartmole
in Troubleshooting
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Go to solution Solved by King_Tuna,

Upgrade to Windows 10. This may solve your problems. Windows 7 may not benefit M.2s advantage.

Posted

I have an I7 5820 on x99 Asrock Fatality X Killer MB and have just upgraded to a Samsung SM951 128 Gig m.2 from a Samsung Evo Pro 128 Gig SSD and have seen boot times increase around 25 %. The only start up item is my AV, m.2 is selected first in Bios which is Latest, I think (1.90), the SSD was wiped with DBAN and given a new letter, m.2 is only about 10 % used, clean install with all other drives disconnected, so what have I missed? I have seen very little on this drive except how fast it is but I have also seen the odd post where it performs very poorly on Windows 7 but flies on Windows 8, 10 on the same machine (MSI MB). Any help appreciated.

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What version of Windows are you using?

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in the BIOS which drive mode are you using?

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You should be booting from the m.2 drive in UEFI mode. Windows 7 is also now old enough that new hardware isn't always going to work as intended.

 

This means your installer should also be set to only support UEFI boot (I recommend rufus to build the USB boot drives for the windows install iso)

 

https://rufus.akeo.ie/

You must select UEFI only options. UEFI-CSM slows down the boot for modern motherboards. Windows 8 and 10 prefer UEFI. Windows 7 can be installed as UEFI as well without using legacy boot.

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Well, that was a painful experience. Obviously changed  something I shouldn't have in Bios and couldn't even boot  back into the Bios. Then, lost CMOS jumper from MB, luckily, I found it. Anyway, no difference with UEFI, think I'll just go back to the SSD tomorrow. Thanks anyway

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  • Solution

Upgrade to Windows 10. This may solve your problems. Windows 7 may not benefit M.2s advantage.

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If it's going over PCIe, the boot time is going to be significantly longer; but OS performance will be MUCH faster.

 

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