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[OCN Labs] Plextor M8Se NVMe Review by Jeffrey Edson - Page 3

post #21 of 23
Thanks for the review. I had been looking into the 960 Evo for m.2/pcie. I'll likely use the pcie slot and the aquacomputer block and adapter bc Im just not crazy about the temps these generate. Now I just need to compare the speeds and prices between the two
post #22 of 23
Quote:
Originally Posted by Nebulous View Post

Well looking at your owner's manual Chapter #3, page #19 the M2 slots share bandwidth with Sata ports#5&6 , so if you have anything connected (Sata drives) you will lose performance on the M2 drive. On my board my 2nd M2 slot shares sata ports #4 & 5 so once an M2 drive is connected I lose those 2 sata ports as they become disabled.

No sure how your board enables or disables those ports, but the manual shows it "shares" those ports, so you're losing 1/2 of the M2's speed if you have anything connected to those ports and have it set to X2 mode.


M2_2 PCIe Bandwidth Configuration: [X2][X4]:
[X2] - Run at X2 mode with Sata6G _56 Enabled
[X4] - Run at X4 mode for Higher Performance with Sata6G_56 DISABLED

So you run the M2 in X4 mode with nothing connected to Sata6G_56 because it will disable them.

Hope this helps.

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.
   
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TheFattenedCalf
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post #23 of 23
Thread Starter 
Quote:
Originally Posted by Bigceeloc View Post

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.
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