Getting Cut on the Bleeding Edge: the Samsung 950 PRO NMVe M.2 SSD & the Dell XPS 13

One of the unfortunate side-effects of not being a “full time tech geek” any longer is that I’m not quite up to speed on certain aspects of technology.  Back when I was a full-time tech writer, I spent every waking minute reading about tech, reviewing tech, testing tech…you get the idea. Since joining the corporate world I still use tech of course, but my immersion is in very specific slices of it; since joining AT&T I know far more about WordPress than I did two years ago for instance.

When I ordered my Dell XPS 13 (early 2015 edition) in May of this year, I purposefully bought it with a 256 GB drive knowing I’d be upgrading to 512 GB within a few months. Dell charged a huge premium for the 512 GB drive (like all OEMs do). I’d been reading about forthcoming NVMe drives since 2014, promising great performance gains because they finally broke away from the legacy AHCI standard. We’re talking over 2x less latency, much deeper queue depth, etc. So with great anticipation I pre-ordered the Samsung 950 PRO, one of the first commercially-available NMVe M.2 drives.

The evening it arrived, I terrifyingly carefully opened my Dell XPS 13 and was pleased I didn’t seem to have broken anything. I get nervous opening up laptops because one hidden screw or clip and you permanently compromise the structure of the device. I installed the Samsung 950 PRO, excited booted the laptop, and hit a wall of #FAIL. It felt like this looks:


Excitement followed by pain describes about 50% of the hardware upgrades I’ve ever done.

No matter what I tried, I couldn’t get the XPS 13 to recognize the drive. My first thought was that it was so new I’d need a BIOS update before the drive would work, but all my Google searches proved fruitless. Given I’d pre-ordered it, and installed it the same day it arrived, I was probably among a handful of people trying to put it in a Dell XPS 13. I had a truly laughable experience with Dell’s “premium XPS tech support” team where, I kid you not, the guy I spoke to in India didn’t even know what an NMVe drive was. As soon as I mentioned PCI Express, he asked me if I was working on a desktop or a laptop (this is after the 5th time I told him it was an XPS 13 laptop). He also told me that because I’d ordered the XPS 13 with a 256 GB drive, that was it’s maximum and it could not be upgraded. The 512 GB XPS 13 was a different model according to him. Dell has some truly world-class-terrible techs. 🙁 Maybe 1 in 10 I’ve spoken with have any clue.

Desperate, I turned to the wisdom of the crowd, posting in the Dell forums (which are full of some very smart and helpful people). After a forum comment from enj63 nudged me in the direction of checking the specs of the 950 PRO, it suddenly all came together: this beast of a drive consumed 5 to 7 watts during use, which is almost as much as the CPU! This NVMe drive is very clearly a desktop part. I made the terrible assumption that M.2 physical slot comparability was all that was needed. My geek prowess was flabby.

So, back to square one! After doing my research I ended up purchasing a 512 GB Samsung SM951. Weirdly, it was more expensive than the 950 PRO, which is newer, faster tech. Go figure. The SM951 installed easily, booted up properly, and now I have a wicked fast 512 GB SSD in my XPS 13, even if it’s not the new hotness of NVMe.

I neglected to run CrystalMark on the drive I pulled out of the XPS 13, so I have no “before” numbers, but here are the after numbers:

Above: speed measured by CrystalDiskMark in 100 MB data chunks.

Above: speed measured by CrystalDiskMark in 1000 MB data chunks.

I’m very happy with the results of the upgrade and my Dell XPS 13 will likely remain in this configuration as long I use it.

UPDATE: According to someone in the Dell forum thread, all I needed to do to get the install working was turn on the legacy boot option in the XPS 13 BIOS. Two people claim to have the 950 PRO up and running on their XPS 13, so perhaps it’s possible after all…