Hi, I have an XPS 9350 model, which had problems with the license, so I performed a clean install of windows 10 as advised by dell technical support. This model has a 256 samsung sm951 NVMe ssd. I was advised to set the ahci mode in the BIOS but I noticed that by default it's setted in RAID so i left it that way. Now I noticed, with a ssd benchmark software, that the write speed is very slow and so I looked for a solution and many people says that it might be related to the "write cache buffer flushing" and to disable it. Doing so I improoved very much the write speed but many suggest to not doing so for safety reasons. So my question is: is it safe to disable it? Or may the lack of performance be caused by not switching to ahci mode? And if so, is it better to clean install windows again with ahci or is it the same to use one of the methods to switch from raid to ahci without reinstalling?
Another minor question is: is it good to let windows update all the drivers after clean install or will I loose some functionality/performance for not using dell's ones?
Thanks for your patience.