Samsung PM951 256GB PCIe NVMe M.2 SSD £89.99 @ Amazon / FLEXX-RAM
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Samsung PM951 256GB PCIe NVMe M.2 SSD £89.99 @ Amazon / FLEXX-RAM

33
Found 11th Nov 2015
Unfortunately one XP941 died completely on me - so looked for a replacement that was not too expensive but still PCIe SSD. Yes we'd all like a 950 Pro but if you don't have the money there's still a solution.

Note: If you don't need a M.2/NGFF PCIe SSD then there are better 2.5" SATA SSDs for similar money.

* Good News: 256GB, NVMe PCIe SSD cheap.

* Bad News: TLC flash, low performance but decent over SATA, don't confuse this with SM951, 950 Pro or even older XP941. OEM so only support is though 3-rd party supplier on Amazon.

* Performance: If you mostly read from it then low write performance should not matter much - not meant as a scratch disk, temp disk, scratch disk, etc. Don't get too hanged up on write bandwidth if you mostly read.

* Price: this is £90 for 256GB, a decent SATA M.2/NGFF SSD (e.g. 850 EVO or MX 200) is about £80 so you're paying only a bit more PCIe. Might become more useful in the future as we transition to PCIe SSDs, e.g. move to a secondary system later on.

For £90 you get a 128GB SM951/XP941 which have reduced performance over 256 or 512GB versions.

* Supplier: Fulfilled by Amazon and FLEXX seems to have good feedback. I'd rather get from Amazon itself but they don't sell OEM drivers.

* Future: Might be worth waiting for Black Friday but PCIe SSDs are pretty niche so not as likely to be reduced as 2.5" SATA siblings.

* More specs

Model: PM951 / Interface: PCI Express Gen3 x4
Form Factor: M.2 / Capacity: 256GB
Sequential Read: Up to 1000 MB/s - Sequential Write: Up to 280 MB/s
Random Read: Up to 250K IOPS - Random Write: Up to 74K IOPS

* More specs @ Samsung

samsung.com/sem…831
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33 Comments
Dam m.2 is getting cheap enough that i might need to start window shopping.. and learn about m.2
Useful if you are considering a small form factor build such as a steam machine and space is an issue.
Great price for a PCIe M.2. The SATA ones are a lot cheaper but that's not really the point is it?
*bought the wrong sort of M.2 drive for his Maximus VII IMPACT board*
Hot for the guidance you offered above - thanks!
Stealth_Fox

Great price for a PCIe M.2. The SATA ones are a lot cheaper but that's … Great price for a PCIe M.2. The SATA ones are a lot cheaper but that's not really the point is it?*bought the wrong sort of M.2 drive for his Maximus VII IMPACT board*



True - though as this is low cost/performance there may be cases where a top SATA one would outperform it, e.g. lots of writing, disk hardware encryption (don't think this is a SED).
NVMe is still early days, perhaps they should have stuck with AHCI on this low-cost version.
sorry, cold simply because I googled it and found one £5 cheaper immediately. here's the link, free p&p included too
flexxmemory.co.uk/sol…B2Q
mikeespain

sorry, cold simply because I googled it and found one £5 cheaper … sorry, cold simply because I googled it and found one £5 cheaper immediately. here's the link, free p&p included toohttp://www.flexxmemory.co.uk/solid-state-drives-ssd/samsung-pm951-m-2-ngff-pcie-solid-state-drive-ssd/samsung-pm951-256gb-m-2-ngff-pcie-gen3-x4-solid-state-drive-ssd-2280-mzvlv256hchp-00000-oem-nvme/?gclid=CN_Rvf3wiskCFc-6GwodwsMB2Q



Sure but that's the case with most small suppliers if you buy direct. But then you have to deal with them for everything.
I have this SSD and paid significantly more then this for it. Blows away a lot of the competition, especially at this price point and in terms of boot times. I couldn't recommend more. Actually I might buy a second and put it in RAID0.
would this fit in the Zenbook?
mikeespain

sorry, cold simply because I googled it and found one £5 cheaper … sorry, cold simply because I googled it and found one £5 cheaper immediately. here's the link, free p&p included toohttp://www.flexxmemory.co.uk/solid-state-drives-ssd/samsung-pm951-m-2-ngff-pcie-solid-state-drive-ssd/samsung-pm951-256gb-m-2-ngff-pcie-gen3-x4-solid-state-drive-ssd-2280-mzvlv256hchp-00000-oem-nvme/?gclid=CN_Rvf3wiskCFc-6GwodwsMB2Q


that's the same seller
obviously going to be more expensive through Amazon, and it's next day prime delivery
heat from me
I should have waited for the 950 Pro but I bought myself the 256gb SM951 from flex ram (seller in this deal) and notice a huge difference. using this as my O.S drive in a ASROCK Z97 Extreme 9

Edited by: "minted83" 12th Nov 2015
I have a 250GB SATA EVO 850 in my HP ZBook 15 G2, do you think I will notice any gain moving to one of these?

Edited by: "snatch_master" 12th Nov 2015
If anyone spots a deal on the 512gb version let us know
snatch_master

I have a 250GB SATA EVO 850 in my HP ZBook 15 G2, do you think I will … I have a 250GB SATA EVO 850 in my HP ZBook 15 G2, do you think I will notice any gain moving to one of these?


no, they are of no use to the average joe but that wont stop them trying to sell it to you
snatch_master

I have a 250GB SATA EVO 850 in my HP ZBook 15 G2, do you think I will … I have a 250GB SATA EVO 850 in my HP ZBook 15 G2, do you think I will notice any gain moving to one of these?


no, they are of no use to the average joe but that wont stop them trying to sell it to you
unreliabletext

Dam m.2 is getting cheap enough that i might need to start window … Dam m.2 is getting cheap enough that i might need to start window shopping.. and learn about m.2



This is crap M.2 though if you're doing M.2 properly. You need SM951 or 850 EVO M.2 for it to be properly done. No real need to go for the 850 EVO M.2. EDITED: I mean 950 Pro not 850 EVO
Edited by: "fishmaster" 13th Nov 2015
Stealth_Fox

Great price for a PCIe M.2. The SATA ones are a lot cheaper but that's … Great price for a PCIe M.2. The SATA ones are a lot cheaper but that's not really the point is it?*bought the wrong sort of M.2 drive for his Maximus VII IMPACT board*



I have the same motherboard which is the right m.2 we need? also does it take away from the pcie lanes?
fishmaster

You need SM951 or 850 EVO M.2 for it to be properly done. No real need … You need SM951 or 850 EVO M.2 for it to be properly done. No real need to go for the 850 EVO M.2



your sentence eats itself. So the only proper M.2 is the SM951 for what I 'need'?


yoyo59

I have the same motherboard which is the right m.2 we need? also does it … I have the same motherboard which is the right m.2 we need? also does it take away from the pcie lanes?


Basically a PCIe M.2 drive, not a SATA M.2 drive. You can usually tell which one is SATA as it's affordable
yoyo59

I have the same motherboard which is the right m.2 we need? also does it … I have the same motherboard which is the right m.2 we need? also does it take away from the pcie lanes?



Which is the exact board - this one?
https://www.asus.com/uk/Motherboards/MAXIMUS_VII_IMPACT/

Yes you need a PCIe M.2 like this one. Yes:

*1: The M.2 slot shares bandwidth with PCIe 3.0/2.0 X16 slot. Bandwidth on the PCIe 3.0/2.0 x16 slot becomes x8 when M.2 device is inserted.
fishmaster

This is crap M.2 though if you're doing M.2 properly. You need SM951 or … This is crap M.2 though if you're doing M.2 properly. You need SM951 or 850 EVO M.2 for it to be properly done. No real need to go for the 850 EVO M.2



It's 1/2 cost of the SM951 though - the 850 EVO M.2 is SATA interface only. Read performance is not bad IMHO.
Adrian7

It's 1/2 cost of the SM951 though - the 850 EVO M.2 is SATA interface … It's 1/2 cost of the SM951 though - the 850 EVO M.2 is SATA interface only. Read performance is not bad IMHO.



Sorry I meant Samsung 950 Pro not 850 EVO.
unreliabletext

your sentence eats itself. So the only proper M.2 is the SM951 for what I … your sentence eats itself. So the only proper M.2 is the SM951 for what I 'need'?



I meant 950 Pro.
minted83

that's the same sellerobviously going to be more expensive through … that's the same sellerobviously going to be more expensive through Amazon, and it's next day prime deliveryheat from meI should have waited for the 950 Pro but I bought myself the 256gb SM951 from flex ram (seller in this deal) and notice a huge difference. using this as my O.S drive in a ASROCK Z97 Extreme 9



​I know it's the same seller, doesn't change the fact it's cheaper. This is about posting the best deals, not just posting it from Amazon.

That site already offers FREE next day delivery on orders purchased before 4pm. Big deal, pay £59 for amazon prime (through another deal) and still pay more. Either way, Amazon is £5 more, + prime (which is more money) for the exact same service that the website I posted came from. Enjoy wasting your money


However, I do take back part of my comment. I'll give heat simply for putting this M.2 SSD in view for us. Adrian7 has helped in letting us know about it

Edited by: "mikeespain" 14th Nov 2015
Adrian7

Sure but that's the case with most small suppliers if you buy direct. But … Sure but that's the case with most small suppliers if you buy direct. But then you have to deal with them for everything.



I would agree, however this offer is from the same sellers, just through Amazon. You're buying from the same people. Amazon give free next day delivery, so do they (if ordered before 4pm)
mikeespain

I would agree, however this offer is from the same sellers, just through … I would agree, however this offer is from the same sellers, just through Amazon. You're buying from the same people. Amazon give free next day delivery, so do they (if ordered before 4pm)



They're not storing your CC/personal data though, it's not even shipped by them. Don't know about you but I try to minimise the number of websites I give my details these days. Plus I know what AZ support is like, don't know how their support is.

Personally this is worth £5 for me, if it's not for you - I have no problem with it.
What's the difference between the PM951 and the SM951?
Dan_the_man28

What's the difference between the PM951 and the SM951?



In very short SM951 is MLC and higher performance, 2x the cost - AHCI or NVMe. PM951 is TLC (not V-Nand so like 840 EVO) thus lower performance, NVMe only.

Most Skylake laptops that will come with PCIe SSDs (e.g. Dell XPS, HP) will have PM951 due to cost; high-end (e.g. Lenovo X1) come with SM951. So we'll see a lot more of it

Note: Both are OEM thus don't expect support from Samsung, e.g. no firmware updates, no Magician, etc. Some may work with OEM (e.g. Lenovo) provided tools and firmware (i.e. scour laptops that use them and use those firmware updates/tools).

Edited by: "Adrian7" 16th Nov 2015
E.g. Lenovo's SSD firmware upgrade covers quite a few SSDs that don't have "official" updates

download.lenovo.com/pcc…txt
Adrian7

E.g. Lenovo's SSD firmware upgrade covers quite a few SSDs that don't … E.g. Lenovo's SSD firmware upgrade covers quite a few SSDs that don't have "official" updates ;)https://download.lenovo.com/pccbbs/mobiles/fwsd28en.txt



Thanks I'd heard there was a firmware update for my SM951 but I haven't been able to find anything about it,

Just so you know I paid £120 for a 256GB SM951 so they are not that much more...certainly not 2x the cost anyway...
Dan_the_man28

Thanks I'd heard there was a firmware update for my SM951 but I haven't … Thanks I'd heard there was a firmware update for my SM951 but I haven't been able to find anything about it, Just so you know I paid £120 for a 256GB SM951 so they are not that much more...certainly not 2x the cost anyway...



The Lenovo one should have it - though their - early - SM951 had firmware that throttled sooner so performance was lower. Later SM951 not sourced off Lenovo X1's behave differently.

You're right, prices seem to have come down quite a bit.
Dan_the_man28

Thanks I'd heard there was a firmware update for my SM951 but I haven't … Thanks I'd heard there was a firmware update for my SM951 but I haven't been able to find anything about it, Just so you know I paid £120 for a 256GB SM951 so they are not that much more...certainly not 2x the cost anyway...


no firmware updates for the SM951 but if you have the NVME version Samsung recently released a Windows NVME driver, which enables TRIM unlike the HP driver a lot of SM951 owners have been running.
ssd.samsungsemi.com/eco….do?fname=/Samsung_NVMExpress_Driver_rev10.zip
that's the installer, driver files can be found here
Are these faster than normal 2.5" ssds?
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