Originally Posted by Bigceeloc
Good research! This is similar to what my Mobo does. It disables SATA port 0 when an M.2 SATA drive is installed. I had to troubleshoot and re-read my manual as well when I ran into that conflict.
So I am well aware of this but I'm not sure if this is the bios, windows version, or even driver related. There is no option to disable the m.2 slot that I can see, and I did read the manual and understand its fine as long as you don't populate those slots. Mine is set to AUTO. So even though I have no m.2 drive and just my SSD, I'm still seeing slower speeds on a regular SSD. I wonder even if the m.2 slot isn't populated it is still messing with SATA speeds? I've tried every port, and can't see any solution so far. I'm thinking it may just be a limitation right now for x370! I have honestly looked at all the major avenues. I am starting to think from seeing other results I'm not the only one seeing this!
Look at this page here and look at SATA ii testing. This review is getting almost the same exact numbers on the same board here
. last I checked GURU 3d was reliable and there it shows 518/493, very close to what I'm getting! My drive should be getting close to 550/510 but no matter what drive I run on this motherboard it's slightly slower than its rated speed. I'm beginning to think maybe the board could be defective? Can some people here run some benchmarks on their SSD and post it. I need comparisons to make sure it's not just my board.