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z370 pro4 |
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errorwww 
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Joined: 07 Sep 2018 Status: Offline Points: 7 |
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 Topic: z370 pro4Posted: 07 Sep 2018 at 6:36pm |
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RLGL
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Joined: 29 Jul 2018 Location: MN Status: Offline Points: 1995 |
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Posted: 07 Sep 2018 at 9:29pm |
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They share lanes with the SATA ports. If using M.2 the corresponding SATA ports must be vacant. The shares are noted in the manual for the board.
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Asrock Z370 Gaming K6,Intel i7 8700K,
Asrock x570 Taichi |
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errorwww
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Posted: 08 Sep 2018 at 12:27am |
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I'm interested in PCIE lanes instead of sata. I want to use 2 samsung 970 evo ssd, they needed PCIE lanes. Sata port speed not enough for these.
Edited by errorwww - 08 Sep 2018 at 12:27am |
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Animalm4st3r
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Posted: 08 Sep 2018 at 2:26am |
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You misunderstood what he said: You only have a limiteed amount of lanes your mainboard can use for communication. Thus M.2 and Sata share communication lines. if your board has NVme ports they will be NVme speeds but if you use them u loose some SATA ports Check the Mainboard Manuals M.2 section it will explain wich Speeds are supported
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errorwww
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Posted: 08 Sep 2018 at 4:33am |
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Not really, I understood it, but I don't care sata ports.
 I know, I will lose 2 sata port from the 6, but who cares. My question about the PCIE lines. If I use 1 M.2 NVme based ssd, it can use pcie 3.0 x4 lines. That's okey, but what happens if I use a second one? Each of them has an own x4 pcie lines or the setup will be x2-x2?MSI has a proper and clear table for this situation, which said if I put the second ssd into M.2 ports, which would like to use PCIE lines, I can't use a physical x4 port(separated) on the motherboard. Edited by errorwww - 08 Sep 2018 at 4:49am |
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Animalm4st3r
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Posted: 08 Sep 2018 at 5:19pm |
AND BTW, theres no PCIe x2 theres Only x16, x8, x4, x1 Edited by Animalm4st3r - 08 Sep 2018 at 5:20pm |
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errorwww
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Posted: 08 Sep 2018 at 5:33pm |
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I mean the 2 ssd has to share the PCIE 3.0 x4 lines. Probably you totally misunderstand the question. Manual don't answer my question at all. Thanks
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badbri
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Joined: 20 Feb 2018 Location: USA Status: Offline Points: 415 |
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Posted: 09 Sep 2018 at 10:11am |
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For the z370 Pro4: The two Ultra M.2 Sockets (M2_1 and M2_2) will each have 4x PCIe if you do not use the SATA ports 0 and 5. There are up to 24 lanes from the z370 PCH and the M2 do not share share with each other, they share only with the 2 SATA ports. Similar to how slot PCIe4 shares with PCIe5 and the PCI slot ("If PCIE5 slot or PCI slot is occupied, PCIE4 slot will run at x2 mode.")
Hope that helps. Have 2 z370 Pro4 and love them both :) |
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https://www.passmark.com/baselines/V9/display.php?id=99573335296
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errorwww
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Posted: 09 Sep 2018 at 3:47pm |
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Yes, thanks!
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Animalm4st3r wrote: