I found an earlier post from 6/24/2018 where a somewhat similar question was posed. I have benchmarked this TB3 attached external drive at 2800 Seq. Read and 560 Seq. Write both on CrystalDiskMark6 and Samsung Magician. I have done the SM Performance Optimization too. Both of my internal Pro970 512GB perform at 3400/2300 in CDM6 and SM. In the post from 6/24/2018 Performance Problem with Samsung 970 Pro, an intel TS rep says Intel is testing and may have a fix. Is the fix available yet? Any updates ?https://forums.intel.com/s/question/0D50P0000490XSFSA2/performance-problem-with-samsung-970-pro-on-n... Also I have 2 internal Pro 970 512Gb and they are benchmarking fine. Any help or assistance in understanding this will be greatly appreciated. The only difference is that the 1Tb is in a TB3 external M.2 enclosure. I suppose that I could temporarily place the Pro 970 1Tb into my M.2 slot 2 and test it there while putting the current Pro 970 M.2 512Gb in the external enclosure and run CDM6 and SM again to see what if any differences there are. It may be the enclosures chipset or perhaps the TB3 cable. I have on order both an active TB3 and passive TB3 certified cables to test out. The cables were selected through the https://thunderbolttechnology.net/ website. Will report back as soon as they arrive.
LeoC_Intel: Thank you for your response. I have verified that I have the latest bios(53 installed last night) and the latest Intel TB3 driver (installed yesterday). I have also verified thru Samsung that the drive in question has the latest firmware. As I posted in the edited post, I'm going to try certified TB3 cables in the next few days as they arrive. I will also be doing your #1 suggestion in your response. I had already decided that I was going to have to do that to verify the disk. If the tests show what I expect them too, then its obviously the chipset and or firmware on the TB3 enclosure itself. It is NOT on the NUC8i7HVK certified list of devices, but then half of what I have attached is not either and all that stuff works fine. So give me a few days to get the cables and transfer the disk back and worth and I'll write up my results and we can go from there. If it is the TB3 enclosure I do have 30 days to get my money back. TIA
LeoC_Intel: I just updated from 5.2.1 Samsung Magician to ver 5.3 and re-ran all the performance tests on all 3: 2x 512Gb and 1Tb ..essentially the results 5.2.1 vs 5.3. Also Sm tells me that TRIM is enabled on all 3. Is there any free software tool/utility that I could use to verify that. I'm on a Windows 10 Pro 1809+Updates PC. I also verified that I have the latest Samsung NVMe driver installed. TIA
Hello @TDean ,
You confirmed that you have the latest 0053 bios installed. Are all the other drivers from Intel site updated too? https://downloadcenter.intel.com/product/126143/Intel-NUC-Kit-NUC8i7HVK
Most important in this case, the Chipset driver, the Thunderbolt Bus Driver and USB Type C Power Delivery Controller.
LWAKSMAN : Yes ALL my Intel drivers are the latest versions. I use the Intel Driver and Assistant program to check my driver situation almost daily. Last night and today I updated LAN and REaltek Audio drivers.
That other thread discussing 970 PRO SSD performance on NUC7i7DNKE was specifically on internally installed NVMe M.2 SSD. If your internal 970 PRO SSDs are giving 3400/2300 numbers with NUC8i7HVK then you don't have the same issue that plagues NUC7ixDN (Dawson Canyon).
Performance issue with TB3 connected storage is likely a different matter. One thing I noticed playing with TB3 on my NUC6i7KYK and NUC8i7BEH is that the TB3 cable is extremely critical for proper functionality. Apparently the max TB3 cable length to sustain the max 40Gbps throughout is 0.5m. At this data rate (2x20Gbps), signal integrity requirements are quite extreme, so the cable must be properly TB3 certified to have any chance of robust operation. Reduced write throughput may have another cause besides signal integrity, though.
Can you provide more details on the TB3 NVMe enclosure you are using?
SChau10: I have both an active and passive 0.5m certified TB3 cables coming within the next 2 or 3 days that I am going to try out on this enclosure. Yes I can provide you with this link to the TB3 enclosure:
I suspect that's it's either the cable or worse case scenario its the chipset/firmware that is poor quality. The only good news is I purchased this on Ebay so I can get my money refunded although it might take some time. At that point I will look at getting a TEKQ Rapide 240GB TB3 https://www.amazon.com/Certified-TEKQ-Rapide-Thunderbolt-Windows/dp/B07C9DY7QF enclosure and testing it out if all else fails. I'm beginning to think I should have sprung for the Samsung X5. TIA
OK I retested the samsung pro 1tb with both passive and active 0.5m certified intel TB3 cables and the results are the same. 2800 seq. read/560 seq.write using both CrystalDiskMark6 64-bit and Samsung Magician Performance Benchmark. So it's NOT a TB3 cabling problem. Tomorrow I will attempt open heart surgery on my NUC8i7HVK and try swapping out my secondary 512GB to see what that does. wish me luck and Happy New Year's to Everybody out there!