10-02-2017 01:39 PM - edited 10-02-2017 01:51 PM
bought a Yoga 720-15 with GeForce 1050 4GB, FHD display, 8GB RAM and 512 GB SSD.
Realized that the SSD is OK-isch on read speeds but not as good as promised by Samsung and that write rates are actually very bad.
In device manager the storage controller is listed as an Intel RAID controller with respective Intel driver, in BIOS it is selected as a RAID type.
I tried to install the Samsung NVMe driver (V2.2 available in the internet), but not possible.
Changed the controller in BIOS from RAID to AHCI. As expected windows ends in blue screen on boot. Same on 2nd boot. On 3rd boot windows starts in repair-/recovery mode. On that menu select the safe-boot. The safe-boot works and windows loads the Samsung NVMe driver automatically. Boot again in standard mode and the system again loads the Samsung NVMe driver. Crystallmark and AS-SSD show improved read values and even more improved write speeds. Speeds now according to Samsung specs and fast as light.
Not sure why ever Lenovo delivered the system w/o proper driver selected and a single SSD in RAID mode in BIOS?!, but for me this now works
10-03-2017 09:03 AM
AS-SSD did not work properly for me. The speed was too low. However, CrystalDiskMark showed the correct speed. I did not need to load any special NVMe drivers.
10-03-2017 11:17 AM - edited 10-03-2017 11:22 AM
Actually the 4K write test in AS-SSD was so slow that I initially thought something is wrong. Iturned back somthing like 1.5MB/s. So I also tried with Crystalmark and same picture. Massive improved write speeds and also read speads improved. Previously in both benchmarks similar levels as in the "Notebookcheck.com" review, now muuuuuuuch better. :-) The above mentioned 4K write is now at ~150MB/s.
Maybe you have a different SW installation? I have the German version. Is your notebook using a NVMe storage driver? Mine had a Intel SATA/Raid driver only in the device manager
10-03-2017 01:23 PM
No, mine says SATA/RAID driver too. Not sure how they did that but it appears to be working fine. Just don't use AS-SSD. ;-)