Hey Fernan I found this article about the XP941 performance states of the drive it self, you might to read on it and if you haven't notice you can test it and see if this theory is true or not, I think it is cause remember when I post one of my benchmarks the different between yours and mine, I think this is relay to that.

http://forums.macrumors.com/showpost.php...15&postcount=25

Well yes, I can confirm that, using the XP941 with the C-State disable you can see better results, but while the C-state enable the M.2 it operates on a medium state performance. Any user of this M.2 SSD form factor with a desktop can confirm that by it self, just run Anvil with the C-state features (ON) then after with the package (OFF) then compare difference of the two.

Fernan the C-state in BIOS, CPU PWM option, the C0, C1, C2, C3 and so on, turn it off in bios then retest the M.2. A person @ ROG forum has the same performance issue with a SM951 and I replay the person to test this option tweak to see the results. If this hypothesis is true, then there is the performance lost reason.

Note: in conclusion of this, what we are doing by disabling the C-state in bios, is the same tweak that all of us do when you install the the rst drivers in a laptop to disable the power link feature, to get better write performance. But the down draw with us since the XP941 and the SM951 use its own data driver so to get the full performance out of this M.2 form factor has to sacrifices the power features on the CPU and no ones like to run theirs CPU at full speed all the time, even when the CPU is not OC. Also you can test this with the CPU at its defaults clock speed but disabling the C-state and you still see the difference in performance, reads and writes. So their is my @Cents hints.

Hey guys, just to let you know I just installed one of these bad boys today in my new GA-Z97X-Gaming G1 WIFI-BK (F7 BIOS also UBU 1.30.1 modified), here are the speeds -

CrystalDiskMark 5.0.2 x64 (C) 2007-2015 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
 
   Sequential Read (Q= 32,T= 1) :  2205.510 MB/s
  Sequential Write (Q= 32,T= 1) :  1589.552 MB/s
  Random Read 4KiB (Q= 32,T= 1) :   770.284 MB/s [188057.6 IOPS]
 Random Write 4KiB (Q= 32,T= 1) :   374.162 MB/s [ 91348.1 IOPS]
         Sequential Read (T= 1) :  1887.185 MB/s
        Sequential Write (T= 1) :  1580.039 MB/s
   Random Read 4KiB (Q= 1,T= 1) :    52.105 MB/s [ 12720.9 IOPS]
  Random Write 4KiB (Q= 1,T= 1) :   195.491 MB/s [ 47727.3 IOPS]
 
  Test : 1024 MiB [E: 0.0% (0.2/476.8 GiB)] (x1)  [Interval=5 sec]
  Date : 2015/08/14 10:46:10
    OS : Windows 10 Professional [10.0 Build 10240] (x64)
 

It is very fast and it boots fine, I currently have 64GB Boot partition, then 365Gb Game Partition and have kept 47Gb free for over provisioning etc.

Got my older Samsung XP951 setup for rest of my data.

Both using Lycom DT-120's

Zitat von mjgr33n im Beitrag #1

---

Hey guys, just to let you know I just installed one of these bad boys today in my new GA-Z97X-Gaming G1 WIFI-BK (F7 BIOS also UBU 1.30.1 modified), here are the speeds -
It is very fast and it boots fine, I currently have 64GB Boot partition, then 365Gb Game Partition and have kept 47Gb free for over provisioning etc.
Got my older Samsung XP951 setup for rest of my data.
Both using Lycom DT-120's

---

Zitat von eroder im Beitrag #2

---

Beautiful! I am upgrading my mobo to GA-Z170 Gaming7 and installing 2 of these in Raid0. Where did you source them? How many sata slots do you lose?

---

@Fernando
Here I report my very bad experience with a SAMSUNG SM951 M.2 Card AHCI 512GB inserted as a secondary drive (my bootable SSD OS is a NVME Intel 750) on ASUS Sabertooth X99 running W10 x64.

This device worked fine, perfectly (and very quickly) 2 days only and afterthat I got a 'no longer detection' problem and it was impossible to do a NTFS format:


I have done some investigation and found via MAGICIAN 4.6 the abnormal SMART values:


I have returned back the unit to the supplier and got my money back.

I have a strong doubt on the reliability of this too 'new' technology.
What do you think about ?

@Fernando
About SAMSUNG Magician 4.6:
You said have your W10 killed when trying to use Magician.
This is a very interesting information, because I think now Magician is the source of the troubles for you and for me.
I explain:
For you, I assume you used SM951 as a primary OS W10 bootable pure AHCI mode. And when you started Magician , this application killed hardware structure of the SM951 and so killed your W10 OS.
For me, I used the SM951 as a secondary drive, in pure AHCI mode, and the first 2 days I had done some performance tests on this new PC and all was running perfectly because I had not installed Magician.
As Crystaldiskinfo and some others tools did not recognize the SMART features of SM951 as i had reported you in a post few days ago, I thought that the SAMSUNG Magician was able to report the SMART infos.
So, i installed Magician, But doing that, Magician killed the SM951 when trying to access the SMART infos. Obvoiusly my W10 drive was not killed because it was running on a 750 PCIe NVM card.
I understand now why the Distributor writed me to not use Magician tool because SM951 is an OEM device.. and Magician was designed for Consumer Samsung SSD only !!
Thanks, Mrs SAMSUNG...

So, at the moment I recommend to NEVER try to use Magician with SM951 !!

On your side, is your SM951 always alive (without Magician installed) ?
Can you try to use your SM951 as a secondary drive AHCI mode ?
What size is it ?

I have seen somewhere on the net that the Eluktro Pro-X Performance 512 GB AHCI TRO - PCIe 3.0 x4 M.2 marketed in US only (at a better price) is stricly the SM951 512GB. And in a technical data sheet it is clearly said that NEVER try to do a Secure Erase (i assume with Magician Tool) on this product because it destroy the hardware.
Compatibility:

"The Eluktro Pro-X Performance PCIe M.2 SSD is compatible in a wide variety of systems, so long as support is built into the system UEFI BIOS code. Please contact us if you have any compatibility questions. Below is a general compatibility guide:

• Z97-based motherboards. Note, some boards have just 2x PCIe lanes on the M.2 socket. Check your system documentation as 4x PCIe lanes are required for maximum performance
• X99-based motherboards. Note, some boards require a 40-lane CPU to feed 4x PCIe lanes to the M.2 socket. Check your system documentation.
• All 2006-2010 classic model Mac Pro computers (when combined with the Lycom DT-120)
• i7 model Intel NUC
• NOTE - The Eluktro Pro is NOT compatible in MacBook, MacBook Pro, iMac, Mac Mini, or the current 'cylindrical' model Mac Pro.

Warranty

3 Year USA Based Eluktronics Warranty

*WARNING: Do not secure erase this SSD. It may render it useless and will void your warranty.*"

Seem this confirm that SM951 hardware does not support (yet) any SSD toolbox ...

What is your opinion ?

@Fernando,
So, it is a good news your SM951 was not destroyed !!!
As i reported you if you run Magician the warranty is avoid, this was confirmed me by the supplier !!!

Can you tell me now how you can get the SMART infos of this SSD ? (CrystalDiskInfo, and lot other tools do not detect this device..)

So, how can you know if your SM951 is in a good health or near to dead ?

have you investigated why this is the case? maybe a driver gets installed? i think intel delivers such a driver for their newest SSDs