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Old 11-29-2018, 01:07 PM   #1
tony
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Default Advice on a Samsung 970 EVO please.

I'm after a ASRock Z390 Extreme4 motherboard and I see it has 8 sata ports my current board I think has 10 sata so I was thinking on a PCIe/NVMe M.2 drive to free up the sata ports.

https://www.amazon.co.uk/Samsung-V-N...Ie%2FNVMe+M.2#

I think this MB support MVME but does it do away with one of the 8 sata ports as well.

Thanks in advance.
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Old 11-29-2018, 02:48 PM   #2
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Just had a look at the manual and I think it does disable two sata ports.
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Old 11-30-2018, 11:05 AM   #3
David Clarke
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I have not looked at the motherboard you mention but all the other motherboards I use disable some of the normal sata sockets if an M.2 is used.
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Old 11-30-2018, 11:42 AM   #4
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Just to confirm what David has said. Any of my M.2 boards also lose at least the last two SATA sockets when an M.2 is connect. This applies to NVMe and SATA M.2 drives, at least with what I've used.

I suspect it's a PCI lane limitation, or sharing. Although it happens on systems of mine where you'd think there's enough bandwidth/lanes to handle it. I have a feeling that the lanes themselves aren't dynamically allocated although the overall bandwidth maybe?
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Old 11-30-2018, 12:17 PM   #5
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Thanks to the two David's.

Looks like I would loose two ports so I wont bother with the M.2 card and use an SSD drive instead. I need all the sata ports.

Thanks guys...as usual :)
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