8 Replies Latest reply on Nov 1, 2016 12:27 PM by Intel Corporation

    Nuc6l7Kyk Storage interface

    Considering

      The interface for the storage can take

       

      2x M.2 22x42/80 (key M) slots for SATA3 or PCIe* X4 Gen3 NVMe or AHCI SSDs<br>

       

      the question is:

       

       

       

      Is the M.2 couple interface rated at PCIe speeds or SATA3?  In plain terms should I get a 950 Samsung Pro NVMe(Pcie) or will the Samsung 850 SSD be the top end?

        • 1. Re: Nuc6l7Kyk Storage interface
          lw1948

          Both SSD will work, but the 950 Pro has much better performance (3 - 4 times faster than Samsung 850). As such the 950 Pro NVMe is proffered.  This is a link to more detailed explanation:The Differences between Samsung NVMe 950 Pro vs. 850 Series

          • 2. Re: Nuc6l7Kyk Storage interface
            Intel Corporation
            This message was posted on behalf of Intel Corporation

            Hello Considering,
             
             
            Yes, that is correct; PCI-e based SSDs are significantly faster. In this case, if you are planning to purchase the unit your bet choice will be the PCIe* X4
             
             
            Regards,
             
             
            Ivan
             

            • 3. Re: Nuc6l7Kyk Storage interface
              N.Scott.Pearson

              Brian,

               

              To represent this in numbers, a PCIe x4 connection has a maximum throughput of 8 GT/s or 3.938 GB/s. A SATA III connection, on the other hand, only has a maximum throughput of 600 MB/s. Now, you aren't going to achieve these throughput rates, however; there are a number of factors that prevent it from happening...

               

              First of all, the flash memory used in the NVMe drives simply cannot support these throughput rates. Here is a chart that I put together sometime back detailing what they can do (numbers pulled from various sources):

               

              Model

              Size (GB)

              Max Read (MB/s)

              Max Write (MB/s)

              Driver Provided?

              Windows 7 Compatible?

              Samsung 950 PRO

              256

              2200

              900

              Yes

              Yes

              512

              2200

              900

              Yes

              Yes

              Samsung PM951

              128

              600

              150

              Yes

              Yes

              256

              1000

              280

              Yes

              Yes

              512

              1050

              560

              Yes

              Yes

              Samsung SM951

              256

              2150

              1500

              Yes

              Yes

              512

              2150

              1500

              Yes

              Yes

              Toshiba XG3

              128

              1840

              590

              Yes

              Yes

              Toshiba OCZ RD400

              128

              2200

              520

              Yes

              Yes

              256

              2600

              1150

              Yes

              Yes

              512

              2800

              1600

              Yes

              Yes

              Kingston HyperX Predator

              240

              1400

              600

              No

              No

              480

              1400

              1000

              No

              No

              Intel 600p

              256

              1570

              540

              No

              No

              512

              1770

              560

              No

              No

               

              Next - and a very important consideration if you are thinking of using RAID 0/1 with a NUC6i7KYK - are bottlenecks in the overall system design. The PCIe lanes provided to the M.2 connectors come from the Platform Controller Hub (PCH). The PCH, in turn, talks to the processor across the DMI bus. The DMI bus also has a theoretical maximum throughput of 8 GT/S or 3.938 GB/s - which is enough to support only one fully-utilized PCIe x4 connection, not two. Worse, remember that the DMI bus is also used to support many other PCH interfaces: USB, LAN, WiFi/Bluetooth, Audio (non-HDMI/DP), the LPC Bus (the SIO and its Consumer I/R, Environmental Monitoring and Fan Speed Control, etc. interfaces) and the SD Card Reader. Bottom line, do not expect a RAID 0 implementation to come anywhere near doubling SSD performance and do not expect RAID1 to not cause a performance hit.

               

              Hope this helps,

              ...S

              • 4. Re: Nuc6l7Kyk Storage interface
                N.Scott.Pearson

                I forgot to mention...

                 

                Much of this information can be found in the various PCIe, SATA and PCH articles on Wikipedia. As well, I also consulted the NUC6i7KYK Technical Product Specification (TPS) and the PCH datasheet (both available on the Intel sites).

                 

                The read/write rates came from the datasheets for the various drives (found on the vendors' sites). In a number of places (sorry, I didn't keep track of where), I replaced their claimed rates with (lower) results that were actually achieved in practical testing (found on sites like Tom's Hardware).

                 

                ...S

                • 5. Re: Nuc6l7Kyk Storage interface
                  Considering

                  Maybe I was not clear.

                   

                  I know that PCIe is faster, but is the motherboard dock PCIe compatible or will it slow down the PCIe to Sata III speeds?


                  As long as we are on this.  Can this Skull Canyon take 24 GB RAM.  1x8 + 1x16?

                  • 6. Re: Nuc6l7Kyk Storage interface
                    N.Scott.Pearson

                    If I understand your question... The two M.2 connectors can be used with either a SATA III M.2 SSD or a NVMe x4 M.2 SSD. When you plug in a NVMe x4 M.2 SSD, the SATA III lane is disabled and unavailable. Bottom line, no, it doesn't slow down to SATA III speeds. Here is a report from when I was testing one of the Toshiba 256GB RD400 drives:

                     

                     

                    The two SODIMM sockets are each connected to a different memory controller in the processor, so different size SODIMMs can, in theory, be used. I have never tried this and, even if it works, I wouldn't recommend it...

                     

                    ...S

                    • 7. Re: Nuc6l7Kyk Storage interface
                      OEFVet

                      950 Pros are good drives but expensive; at the time of my purchase the only available NVME. Now there are many lower cost options which will hit the DMI bottleneck like the 950pro.

                       

                      No Raid:

                      NORAID.PNG

                       

                      Raid0

                       

                      RAID0.PNG

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                      • 8. Re: Nuc6l7Kyk Storage interface
                        Intel Corporation
                        This message was posted on behalf of Intel Corporation

                        Thank you all for sharing this valuable information with us!
                         
                         
                        Best regards,
                         
                        Ivan.