SentryFox
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How many SATA devices can I attach if the M2 slots are fitted with a SSD and Optane cache?
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EVGATech_AdamB
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Re: M.2 SSDs and HDDs
2018/03/29 15:43:44
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Hello and welcome to the forums! For a Z370 motherboard, if both M.2 slots are populated then only SATA ports 2 and 3 would still be available. If you had a M.2 hard drive and an Optane drive installed, then you would only be able to connect two more hard drives through SATA.
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SentryFox
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Re: M.2 SSDs and HDDs
2018/03/29 17:27:08
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Hi Adam, thank you for the welcome and answer.
Is that still the same is PCE-6 speed is changed from x4 to x2?
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EVGATech_AdamB
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Re: M.2 SSDs and HDDs
2018/03/29 17:52:56
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Yes, if an M.2 slot is in use, then certain SATA ports would be disabled depending on the M.2 slot in use. That behavior would not change if you changed the PCIe speed.
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rjohnson11
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Re: M.2 SSDs and HDDs
2018/04/01 12:07:22
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The CPUs that support the Z370 only have 16 PCI-E lanes so resources have a limitation.
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EVGA_Lee
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Re: M.2 SSDs and HDDs
2018/04/02 14:37:24
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Each Z370 motherboard has a different relationship between the SATA ports and PCIe/M.2 slots.
Z370 Micro loses no SATA ports if you use the PCIe slots and/or M.2 Key M slot.
Z370 FTW loses up to 4 SATA ports if you use both M.2 Key M slots.
Z370 Classified K loses 2 SATA ports if you use the bottom M.2 Key M slot (but none if you use the top M.2 slot), and loses 2 SATA ports if you set PCIe slot 6 to x4 in the BIOS. If PCIe slot 6 is left at x2 in the BIOS, then you will not lose any SATA ports due to lane sharing.
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rjohnson11
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Re: M.2 SSDs and HDDs
2018/04/03 23:38:45
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EVGATech_LeeM
Each Z370 motherboard has a different relationship between the SATA ports and PCIe/M.2 slots.
Z370 Micro loses no SATA ports if you use the PCIe slots and/or M.2 Key M slot.
Z370 FTW loses up to 4 SATA ports if you use both M.2 Key M slots.
Z370 Classified K loses 2 SATA ports if you use the bottom M.2 Key M slot (but none if you use the top M.2 slot), and loses 2 SATA ports if you set PCIe slot 6 to x4 in the BIOS. If PCIe slot 6 is left at x2 in the BIOS, then you will not lose any SATA ports due to lane sharing.
Good info Lee. Thanks for sharing.
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Cordorb
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Re: M.2 SSDs and HDDs
2018/04/05 19:19:00
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could you please express that in A Venn diagram :-)
When Intel released the information about lane sharing I have tried to make a table of how this works and not have to fall back to programming a bunch of IF then Else statement.
no luck
I just use a camera snapshot of the different EVGA motherboards silk screen
At least in the BIOS it will show which items are disabled
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quadlatte
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Re: M.2 SSDs and HDDs
2018/04/05 20:06:11
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bit of a downgrade on features from the z270 line, the classified k used to lose only two ports but you had a extra 4 via the marvell chip on the z270 classy. the u.2 was no big loss since hardly any drives were made for it.
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batboy88
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Re: M.2 SSDs and HDDs
2018/04/05 23:55:28
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why don't they just do that dude..make big enough m.2's and get rid of most sata stuff.
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Hoggle
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Re: M.2 SSDs and HDDs
2018/04/06 00:06:38
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I am kind of wondering about the "Optane Cache" with the SSD. Optane seems to work best with a HDD and not a SSD. It would kind of depend on what drive the OS is on but if it's on the SSD I personally would say Optane isn't as important as it will only speed up performance on the drive it's paired with. A fast SSD won't really speed up much but you would see a nice performance increase from a HDD trying to access a file that is stored on the faster Optane cache.
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batboy88
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Re: M.2 SSDs and HDDs
2018/04/06 00:18:42
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the m.2 is plenty...while the PNY one isn't that fast but it's ok and been reliable. It's about on par maybe a little faster than the WD....
Samsung still winning dude.
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nothi
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Re: M.2 SSDs and HDDs
2018/04/09 12:01:41
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quadlatte
bit of a downgrade on features from the z270 line, the classified k used to lose only two ports but you had a extra 4 via the marvell chip on the z270 classy. the u.2 was no big loss since hardly any drives were made for it.
I was miffed when I learned that you lose so many ports on the FTW when using the M2 slots, especially for a $210 board. I have two NVME cards. :/ Lesson learned...if I didn't get both the FTW and K on sale I'd have looked elsewhere. Plenty of other boards that do lane sharing just fine without completely disabling so many SATA ports. (4 out of 6 is ridiculous)
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quadlatte
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Re: M.2 SSDs and HDDs
2018/04/10 22:38:26
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batboy88
why don't they just do that dude..make big enough m.2's and get rid of most sata stuff.
How big you want, there some large capacity m.2 drives if your willing to part with the cash
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quadlatte
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Re: M.2 SSDs and HDDs
2018/04/10 22:44:40
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Hoggle
I am kind of wondering about the "Optane Cache" with the SSD. Optane seems to work best with a HDD and not a SSD. It would kind of depend on what drive the OS is on but if it's on the SSD I personally would say Optane isn't as important as it will only speed up performance on the drive it's paired with. A fast SSD won't really speed up much but you would see a nice performance increase from a HDD trying to access a file that is stored on the faster Optane cache.
Very true, optane works best with hdd, no need for them on a SSD based system at all. To bad you are limited to only the boot drive with optane, I could see it working well with say a 6TB storage hdd.
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SentryFox
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Re: M.2 SSDs and HDDs
2018/04/15 11:04:18
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Hi Guys,
Just finished building my new PC but I cannot set-up the Optane drive. What Bios settings do I need?
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ZoddWoW
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Re: M.2 SSDs and HDDs
2018/04/21 20:10:31
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When considering M2 drives, be sure you know what your buying, many M2 drives are just SATA on a stick and do not take advantage of what PCIe has to offer.
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DustoMan
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Re: M.2 SSDs and HDDs
2018/04/27 08:41:35
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quadlatte
Hoggle
I am kind of wondering about the "Optane Cache" with the SSD. Optane seems to work best with a HDD and not a SSD. It would kind of depend on what drive the OS is on but if it's on the SSD I personally would say Optane isn't as important as it will only speed up performance on the drive it's paired with. A fast SSD won't really speed up much but you would see a nice performance increase from a HDD trying to access a file that is stored on the faster Optane cache.
Very true, optane works best with hdd, no need for them on a SSD based system at all. To bad you are limited to only the boot drive with optane, I could see it working well with say a 6TB storage hdd.
They recently added support for secondary/data SATA drive acceleration: https://www.intel.com/con...emory-and-storage.html
Dusto dustoman (at) gmail (dot) com   
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whisperingshadow
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Re: M.2 SSDs and HDDs
2018/04/27 10:53:01
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From what I have read, optane only helps non-ssd drives...
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Cordorb
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Re: M.2 SSDs and HDDs
2018/04/28 15:08:56
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15.8.0.1006 is the version I have that came with the board but
Intel says 16.0.2.3402 is needed for secondary/data SATA drive acceleration
then is says :Consult your motherboard vendor for the proper system BIOS version for this support.
Not sure where that leaves us ?
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EVGA_Lee
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Re: M.2 SSDs and HDDs
2018/05/01 13:34:29
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Cordorb
15.8.0.1006 is the version I have that came with the board but
Intel says 16.0.2.3402 is needed for secondary/data SATA drive acceleration
then is says :Consult your motherboard vendor for the proper system BIOS version for this support.
Not sure where that leaves us ?
I'll follow up with our BIOS team for this.
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EVGA_Lee
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Re: M.2 SSDs and HDDs
2018/05/08 17:32:17
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EVGATech_LeeM
Cordorb
15.8.0.1006 is the version I have that came with the board but
Intel says 16.0.2.3402 is needed for secondary/data SATA drive acceleration
then is says :Consult your motherboard vendor for the proper system BIOS version for this support.
Not sure where that leaves us ?
I'll follow up with our BIOS team for this. Hi Cordorb, It looks like a new version of Intel RST is needed to fix this. We should be able to add this in a day or two.
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SentryFox
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Re: M.2 SSDs and HDDs
2023/01/28 08:41:17
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Hi Guys, recently upgraded the PC to an i9-9900k and two new nvme SSDs that i put into RAID-0 but i am getting half the speed I was before. 3500mb/s where as before i was getting close to 7000mb/s. I have drives in SATA ports 0,1,2,3. Any ideas why I am getting the reduced speed in RAID for the nvme drives. Other drives work fine and run at full speed.
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