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SM951 as OS boot device information
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Points: 193 		Post Options Post Options   Thanks (0) Thanks(0)   Quote odiebugs Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2015 at 10:19am
Xaltar, also on the main post I say you add driver info.

We have all seen what windows AHCI, RST, drivers and the Intel AHCI, RST drivers can do in a per board case.  People seen where the win AHCI beat the Intel AHCI.  

Sometimes  some found the Intel was better, especially in RAID. 

Maybe adding how people should bench both to see what their system will run like with drivers. 

As time goes on we should see many update to the NVMe drivers from Intel and from Windows.

As of now, windows has it's driver using Force Unit Access,  IO writes, which go by the DRAM and write to flash, lowering bandwidth where the Intel doesn't.
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Originally posted by Xaltar Xaltar wrote:

Important update:

It has come to my attention (thank you Parsec) that the SM951 is not in fact an NVMe supporting drive, while it was originally claimed by Samsung that it would support the feature the final release product is in fact AHCI not NVMe. 

Boot support for the Z97 Extreme6 is confirmed as being applied in beta bios 2.04 and then in release version 2.10. Interestingly the 2.10 bios revision only notes the addition of NVMe support and not improved M.2 support as stated on the 2.04 beta bios. This did not help my confusion Angry LOL

So as it stands I can only confirm support on the Z97 Extreme6 with bios version 2.10 and Z77 Extreme4 with the bios download linked here in this thread.

I do however suspect that all boards updated with NVMe support likely also received the same improved M.2 support the Z97 Extreme6 received and as such should support booting from the SM951.


I have added this info to the OP
Offically Samsung has said that the drives are AHCI, but in a few OEM hardware there are NVMe out for testing and the company has tried to hide it because they won't be retail for a while. 
The AHCI version carries the code H in the model number and the NVMe has a V in it.

The AHCI is MZ-HPV xxx0,  and the NVMe is a MZ- VPVxxx0.  Sent out I guess to be tested in a few OEM machines but probably close to no one can get their hands on one until they decide to push them out. 

Kind of guessing, when they first denied they were any NVMe.  I guess it's good they see what can happen before producing for retail and finding problems over time.  They didn't have many happy people with the last EVO problem. 

Lots of the same story about the NVMe, but I see that even Anandtech has run some benches and got their hands on one.

I have followed them for a long time and they are tops among the hardware crowd. 

Even Toms hardware, say they have a NVMe tested. They also have a different story in a way, saying they are close to going to the shelf.

Looking at the bench tests, looks like they are NVMe.


Edited by odiebugs - 22 Jul 2015 at 8:40am
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Xaltar:  Can you post some info on booting under main for M2, as to any BIOS / UEFI settings, and if the M2 will be seen in drive list in it, and if MBR and GPT both work.  

A nice guide would help as you see there have been questions, and soon will grab one to replace windows boot on RAID.  Thanks.

Maybe you could also cover the difference in M2 as it pertains to one being SSD and one a PCI-e interface on the M2.


Edited by odiebugs - 22 Jul 2015 at 4:29am
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Thanks Gunslinger, I'll add it to the OP for any other Z87m OC Formula users.
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Eddy from Tech Support has just linked it in this thread here....

http://forums.tweaktown.com/asrock/61077-clutching-straws-sm951-support-z87m-board.html#post499137


note that whilst it is referred to as "L1.83A" there is no "L" in the filename once unpacked from the archive, or referenced in the BIOS after flashing (not that i saw anyway)
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Great news Thumbs Up

Would you mind uploading and sharing the BIOS you were sent for your board so I can put it on the list of boards with custom bios for the SM951?
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I got a new BIOS from Tech Support for my Z87m OC Formula, it's now booting happily off the Samsung SM951 (AHCI) into Windows 7 64bit

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I set out to provide useful information on the SM951 front with this thread thinking it would be easy to just gather all the useful info from other threads on the matter. Boy was I wrong lol.

Hopefully the info I have provided now will be at least mostly accurate. Thank you to everyone helping out, this thread is designed to be informative to anyone having issues booting from the SM951.
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yeah, the whole m.2 format is a minefield, and then Samsung go and drop 2 different versions of the same SSD with the same model name... lol, typical.

Does the NVMe version also support AHCI ? .... and there goes the can holding all the worms lol


Edited by Gunslinger - 28 Jun 2015 at 8:23pm
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Important update:

It has come to my attention (thank you Parsec) that the SM951 is not in fact an NVMe supporting drive, while it was originally claimed by Samsung that it would support the feature the final release product is in fact AHCI not NVMe. 

Boot support for the Z97 Extreme6 is confirmed as being applied in beta bios 2.04 and then in release version 2.10. Interestingly the 2.10 bios revision only notes the addition of NVMe support and not improved M.2 support as stated on the 2.04 beta bios. This did not help my confusion Angry LOL

So as it stands I can only confirm support on the Z97 Extreme6 with bios version 2.10 and Z77 Extreme4 with the bios download linked here in this thread.

I do however suspect that all boards updated with NVMe support likely also received the same improved M.2 support the Z97 Extreme6 received and as such should support booting from the SM951.


I have added this info to the OP
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