At first I had sm961 256GB which was fast enough ( I mean boot time was very short) but after 2 years of using it started slow booting of windows10 and when I checked the health status of ssd it was 96% and 13.5TB writes which is not so bad but despite of this I changed to 970pro (new) which has much more speed and endurance.
My laptop Asus Rog G752VS OC Edition with 970pro 512gb boots very slowly (even shutdown/restart process is long) the time it needs to boot windows 10/11 is 23 seconds.
I tried fresh install of windows 10/11 with different versions of OS,drivers,nvme drivers,bios (moded also),RAM modules and quantities (1 slot,2 slots,3 slots,4 slots) and also tried different nvme ssd models but with no luck.
Also I did crystaldiskmark test and got the result 970pro provides at maximum speed.
Checked with AIDA64 software as well and got maximum speed.Also when I checked pcie controller speeds it showed pcie 2.0 speed at x4 bandwidth which I don't know is current speed when I don't use it or maximum negotiated speed (maybe it's current speed because read/write test shows 3500MB/2300MB).
I checked specs with hwinfo64 as well and got x4 8GT/s which is equal to PCIe 3.0 4x (4x985MB/s) that is the speed 970pro can transfer (laptop supports pcie3.0 x4 as well) at maximum load (PCIe 3.0 4x) but despite of this windows 10 boots very slowly.
Also I have to mention that when I press power button the laptop turns on then off and then turns on again and starts booting .The whole process takes as a minimum 23 seconds to complete.
My laptop specifications:
Laptop-Asus Rog G752VS OC Edition
Storage1-970PRO 512GB (new)
Storage2-860EVO 1TB SATA
RAM-48GB DDR4 2400MHz
Battery-in perfect condition
Thermals-in perfect condition