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[Official] Samsung SM951 Owners Club - Page 68

post #671 of 1390
Hi all,

Since I'm just a sysadmin and not a real hardware junky I decided to post a question here at the pro's. I've read this topic but I'm wondering wat exactly the pros and cons of the NVMe and AHCI version are. The info I could find stated that the IOPs where higher on VNMe but the support for Windows could be a hassle. This can be fixed, but on the NVMe some people are also facing temperature issues and read / write drops. I currently have the AHCI version and ordered a GA-Z170M-D3H mobo. Did I may be made a whoops on the AHCI version and should I swap it for a NVMe?

Hope to hear, thanks from a hardware newbie tongue.gif
post #672 of 1390
Thread Starter 
Keep the AHCI version, Esp. with the Z170, You'll only be missing out on IOPS. The AHCI versions are running flawless for everyone as far as I've read and I'm one of them.
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post #673 of 1390
I second that, I love my SM951 AHCI. I'm gonna wait until NVMe is a bit more mainstream before switching to it.
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post #674 of 1390
Quote:
Originally Posted by Stevoa5 View Post

Hi

I'm having real trouble installing my OS on my SM951.
I've scoured everywhere, made several UEFI USBs using different programs, tried all manner of bios configurations, got raid drivers from other manufacturers, tried both M.2 slots, and I'm at a loss.

Everything I've followed gets to the "and when you run the windows install you should now see your ssd listed" But I don't frown.gif

I'm trying to install Win 8.1 and then intend to update to Win10. I've got a Gigabyte Z170x Gaming 7, an SM951 ACHI, no other sata drives plugged in, my GPU is now unplugged.

You need to boot in UEFI mode and your Windows DVD / USB drive must be UEFI boot capable. Especially USB drives cause lots of problems when installing W7 in UEFI Mode. W8 and W10 USB drives made with the download tool work very well, but W7 USB drives not.
So use an original untouched (non-modified) Windows 7 DVD and switch boot mode to UEFI only. Also you need to put your SSD to GPT mode. You can do this by pressing SHIFT + 10 during Windows Setup and then use diskpart to clean your SSD. W7, if booted in UEFI Mode, will then set GPT mode automatically.
Quote:
Originally Posted by Paul-dH View Post

The info I could find stated that the IOPs where higher on VNMe but the support for Windows could be a hassle. This can be fixed, but on the NVMe some people are also facing temperature issues and read / write drops. I currently have the AHCI version and ordered a GA-Z170M-D3H mobo. Did I may be made a whoops on the AHCI version and should I swap it for a NVMe?

Actually, the NVMe version is easier to install than the AHCI Version, because the NVMe modell doesn't require UEFI mode. However if you want to use W7, NVMe gets a little bit more complicated because it has no drivers. But there are W7 NVMe drivers out there that you can use.

I switched from SATA to XP941 to SM951 AHCI and to NVMe and i never want to go back to a SATA oder PCIe AHCI drive. Chris from THG wrote in his review of the NVMe version: "you will notice snappier performance from the reduced latency" and i think this pretty much nails it.

But i guess not everyone will notice this. It's like when people complain that 60fps are not enough or people who notice 30ms of input lag and say it's unbearable.
Edited by h00bi - 10/26/15 at 12:56am
post #675 of 1390
Quote:
Originally Posted by h00bi View Post

Actually, the NVMe version is easier to install than the AHCI Version, because the NVMe modell doesn't require UEFI mode. However if you want to use W7, NVMe gets a little bit more complicated because it has no drivers. But there are W7 NVMe drivers out there that you can use.

I used RamCity's YouTube video as a guide to install the SM951 on the ASUS X99-A, but I couldn't get my UEFI USB installer to load until I followed the steps in a youtube video here: https://www.youtube.com/watch?v=sDm8rWr3dV8

To get Windows 7 to recognize the NVME drive, I read a procedure on Tom's Hardware that involved extracting a couple installer files (setup.exe and boot.wim) from a Windows 10 ISO and pasting them over the Windows 7 ones which aren't NVME compatible. In the end, it worked.
post #676 of 1390
Quote:
Originally Posted by h00bi View Post

You need to boot in UEFI mode and your Windows DVD / USB drive must be UEFI boot capable. Especially USB drives cause lots of problems when installing W7 in UEFI Mode. W8 and W10 USB drives made with the download tool work very well, but W7 USB drives not.
So use an original untouched (non-modified) Windows 7 DVD and switch boot mode to UEFI only. Also you need to put your SSD to GPT mode. You can do this by pressing SHIFT + 10 during Windows Setup and then use diskpart to clean your SSD. W7, if booted in UEFI Mode, will then set GPT mode automatically./quote]
I gave this a go and even diskpart cannot see my drive, I'm starting to think the SSD is just a dud for the beginning.
post #677 of 1390
Well I decided to test out the Samsung NVME Driver from the HP website.

http://h20564.www2.hp.com/hpsc/swd/public/detail?swItemId=wk_149537_1&swEnvOid=4059

Here are the results with my 256gb Samsung SM951.


Windows Driver With "Turn off Windows write-cache buffer flushing on the device" Checked. I had to have this checked with the windows driver even though it was a risk with losing data as I would get very VERY low write speeds after 10 mins.




Samsung NVME Driver "Turn off Windows write-cache buffer flushing on the device" Checked.


Samsung NVME Driver "Turn off Windows write-cache buffer flushing on the device" Un-checked. It actually works without having the box checked in policies therefore minimal risk of data loss.




So this driver seems better than the windows one for now. Looking forward to see if they actually bring out an updated NVME driver soon though, as the driver I have is for Win 7 but I am on Win 10.

No issues yet though and Trim works fine.


Heres my 840 pro raid for lol's.
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Skylake!
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Old School!
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post #678 of 1390
Quote:
Originally Posted by llantant View Post

Well I decided to test out the Samsung NVME Driver from the HP website.

http://h20564.www2.hp.com/hpsc/swd/public/detail?swItemId=wk_149537_1&swEnvOid=4059

Here are the results with my 256gb Samsung SM951.


Windows Driver With "Turn off Windows write-cache buffer flushing on the device" Checked. I had to have this checked with the windows driver even though it was a risk with losing data as I would get very VERY low write speeds after 10 mins.




Samsung NVME Driver "Turn off Windows write-cache buffer flushing on the device" Checked.

Samsung NVME Driver "Turn off Windows write-cache buffer flushing on the device" Un-checked. It actually works without having the box checked in policies therefore minimal ris
k of data loss.




So this driver seems better than the windows one for now. Looking forward to see if they actually bring out an updated NVME driver soon though, as the driver I have is for Win 7 but I am on Win 10.





Do not be too sure about that wink.gif
post #679 of 1390
Quote:
Originally Posted by Nizzen View Post

Do not be too sure about that wink.gif

Care to elaborate on this nonsensical statement?
post #680 of 1390
Quote:
Originally Posted by DS4130 View Post

Care to elaborate on this nonsensical statement?

If you want minimal risk of dataloss, you buy an ssd with PLP capacitors (power loss protection) thumb.gif

...and take backup biggrin.gif
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