SM951 Performance

ginjaninja · 22 Jul 2015 at 00:30

How might i squeeze out a bit more performance..ive seen some people with faster writes.

Windows 10
Intel Chipset Drivers Installed
AHCI
UEFI Secure Boot
Asus X99 usb3.1
5820k @ stock

thanks

crinkleshoes · 22 Jul 2015 at 00:59

Here's mine with X99-S mobo:

Samsung951-512GB by CosmicLogos, on Flickr

I see you have the 256GB version... are you comparing your speeds to the 512GB version or 256GB version?

The size difference could easily explain that difference in speed.

Greebo · 22 Jul 2015 at 07:31

512 are much much faster than the 256 and 128 versions. Iops massively so.

ginjaninja · 22 Jul 2015 at 08:06

noooo, i thought 256 and 512 were same speed :-)

..thanks for pointing me in right direction.

Greebo · 22 Jul 2015 at 08:34

ginjaninja said:
noooo, i thought 256 and 512 were same speed ..thanks for pointing me in right direction.

in real life you wont notice any difference.

HEADRAT · 22 Jul 2015 at 09:47

I'm waiting for NVME verion

http://www.tweaktown.com/reviews/7181/samsung-sm951-nvme-2-pcie-256gb-ssd-review/index11.html

Deathjester · 22 Jul 2015 at 11:30

My 256GB looks very similar in performance to the one if the first post, running on Z97 Asus Maximus Impact VII.

Greebo · 22 Jul 2015 at 11:44

HEADRAT said:
I'm waiting for NVME verion

http://www.tweaktown.com/reviews/7181/samsung-sm951-nvme-2-pcie-256gb-ssd-review/index11.html

Why wait you can buy them now

However, I have some doubts about what OCUK stated that the NVME is just a firmware change and you will be able to flash the current ones with it.

From reviews Ive read the circuit baord is definitely different.

haszek · 22 Jul 2015 at 11:51

Is it worth to get this kind of hard drive for new Skylake setup? Compared to let's say Evo850?

Greebo · 22 Jul 2015 at 11:53

haszek said:
Is it worth to get this kind of hard drive for new Skylake setup? Compared to let's say Evo850?

Yes. For the little extra money it costs you may as well make full use of the onboard m2 slot. Saves space as well

ANd if u can hold out for a NVME they have insane IOPS of 300k.

Stock should start appearing in larger quantities from around now.

I relegated my old 830 ssd to a games drive

haszek · 22 Jul 2015 at 11:55

Cheers

Mick-1965 · 22 Jul 2015 at 12:49

ginjaninja said:
How might i squeeze out a bit more performance..ive seen some people with faster writes.

Windows 10
Intel Chipset Drivers Installed
AHCI
UEFI Secure Boot
Asus X99 usb3.1
5820k @ stock

thanks

I get very similar results to you, apart from the sequential q32 reads.
30% down is well out of the margin of error.
Did you have to do anything, in particular to get it running like that ?

Also similar system, Asus X99-s, with 5820k @ 4.4 Win 8.1 with latest chipset and iRST drivers. Althouigh it doesnt show in the list of drives in iRST.

Greebo · 22 Jul 2015 at 14:47

ACHI enabled?

Mick-1965 · 22 Jul 2015 at 16:07

There is no option (that I can find) to enable or disable AHCI on the m.2
But I assume its enabled from this.

ED209 · 22 Jul 2015 at 16:25

Mick-1965 said:
There is no option (that I can find) to enable or disable AHCI on the m.2
But I assume its enabled from this.

the option is under the bios and not a option in windows.

ginjaninja · 22 Jul 2015 at 16:55

given how quirky it is, perhaps being in uefi/secure boot mode is the difference?..i have the same standard microsoft driver as you,

Mick-1965 · 22 Jul 2015 at 18:10

ED209 said:
the option is under the bios and not a option in windows.

Thats what I meant. There is no option in the bios to enable disable AHCI for the m.2

ginjaninja said:
given how quirky it is, perhaps being in uefi/secure boot mode is the difference?..i have the same standard microsoft driver as you,

Thats the only way to boot from the sm951. So Im also running uefi/secure boot

So I'm guessing you didn't have to force pci-e Gen 3 in any way. or any other setting.

I had to force pci-e gen 3 for my graphics card from the BIOS.( GPU-z reported it previously as running gen 2)
Just wondering if this need to be done for the m.2 slot some how.

ginjaninja · 22 Jul 2015 at 20:20

i hadnt changed any bios settings w.r.t m.2.
just turned off csm.

My gpu is also gen 2.0..willl look out for that setting..Had to move gpu away from slot 1 due to size of nh-d15

Greebo · 22 Jul 2015 at 21:22

Mines a different board but i had to set pci-e 3 for my m2 slot as well

Mick-1965 · 22 Jul 2015 at 22:05

ginjaninja said:
i hadnt changed any bios settings w.r.t m.2.
just turned off csm.

My gpu is also gen 2.0..willl look out for that setting..Had to move gpu away from slot 1 due to size of nh-d15

in the BIOS >advanced>system agent > nb configuration

Greebo said:
Mines a different board but i had to set pci-e 3 for my m2 slot as well

Cant find an option anywhere with any setting for the M.2

Is there an app that will tell you what speed the pci-e is running at, something like what GPU-z does with the graphics card ?