Technology and gaming content trusted in North America and globally since 1999
8,542 Reviews & Articles | 59,959 News Posts

Samsung SM951 512GB M.2 PCIe SSD Review (Page 3)

Chris Ramseyer | Jan 30, 2015 at 08:42 am CST - 2 mins, 41 secs reading time for this page
Rating: 98%Manufacturer: RamCity

Desktop Test System

Samsung SM951 512GB M.2 PCIe SSD Review 50 | TweakTown.com

We ended up using several different systems to test the SM951 to test compatibility. We ended up settling on the ASRock Z97 Extreme 6 since it has a native PCIe 3.0 x4 to an onboard M.2 socket. I also used the ASUS motherboard in the system specs above with an ASUS adapter as well as an ASUS X99 WS with the onboard M.2 connector and an adapter.

We'll publish a follow up article with all of the performance data at a later time. Choosing the right PCIe slot in your system with an adapter will be essential to getting full performance out of the SM951. We did find that in nearly every case, the M.2 socket provided the most bandwidth for this high speed SSD.

Lenovo X1 Gen 3 - Notebook Power Testing with M.2 and Windows 8.1 Pro

Samsung SM951 512GB M.2 PCIe SSD Review 21 | TweakTown.com

Our SM951 came in a very nice carbon fibre package, a Lenovo X1 Carbon Gen 3. This new notebook allows us to test SATA, AHCI and NVMe based M.2 SSDs. We'll use this system to measure notebook battery life performance on M.2 form factor devices.

Initial Performance Evaluation - 4-Corner and then Some Tests

Sequential Read

Samsung SM951 512GB M.2 PCIe SSD Review 25 | TweakTown.com

Sequential Write

Samsung SM951 512GB M.2 PCIe SSD Review 26 | TweakTown.com

Sequential 80% Read 20% Write

Samsung SM951 512GB M.2 PCIe SSD Review 27 | TweakTown.com

We added a new color to the chart today, black. The old style remains the same, QD1 in green. Like a stoplight, green means go, yellow for QD4 and red for QD10. Traces recorded on SSDs show that the drives are so fast it's difficult to ramp up high queue depths. That's where the stop light colors come from.

The new color is black, the no man's zone. This shows QD32, a nearly unobtainable depth, but the depth most companies measure and publish performance with. Samsung's document for the general availability SM951 states a sequential read performance of 2150 MB/s. We have the Lenovo model with a specific Lenovo model number and can only achieve around 1700 MB/s sequential. The Samsung document states their 2150 MB/s run is with 128KB sequential data at a queue depth of 32. We matched the setting and didn't hit that mark. We didn't just want to say we didn't hit the mark without showing a 128KB sequential test at QD32.

Now that the disclaimer has been made again, feast your eyes on that! We're getting roughly 1600 MB/s in both sequential reads and sequential writes. Our mixed workload numbers also scale really well. We've yet to test a consumer PCIe SSD that scales sequential 80/20 workloads this well.

Random Read

Samsung SM951 512GB M.2 PCIe SSD Review 28 | TweakTown.com

Random Write

Samsung SM951 512GB M.2 PCIe SSD Review 29 | TweakTown.com

Random 80% Read 20% Write

Samsung SM951 512GB M.2 PCIe SSD Review 30 | TweakTown.com

We really don't mind the lower sequential read performance because the low queue depth random read performance makes up for it and then some. The high queue depth random read performance is also higher than the spec sheet lists. In this test, the drive is hammered, so there is some level of precondition. The test also runs each scenario for a long period of time, this levels out any burst numbers. Later in the review we'll see higher random performance, but only because of initial burst performance.

Last updated: Nov 15, 2019 at 01:16 pm CST

PRICING: You can find products similar to this one for sale below.

USUnited States: Find other tech and computer products like this over at Amazon.com

UKUnited Kingdom: Find other tech and computer products like this over at Amazon.co.uk

AUAustralia: Find other tech and computer products like this over at Amazon.com.au

CACanada: Find other tech and computer products like this over at Amazon.ca

DEDeutschland: Finde andere Technik- und Computerprodukte wie dieses auf Amazon.de

ABOUT THE AUTHOR - Chris Ramseyer

Chris Ramseyer started his career as a LAN Party organizer in Midwest USA. After working with several computer companies he was asked to join the team at The Adrenaline Vault by fellow Midwest LAN Party legend Sean Aikins. After a series of shake ups at AVault, Chris eventually took over as Editor-in-Chief before leaving to start Real World Entertainment. Look for Chris to bring his unique methods of testing Hard Disk Drives, Solid State Drives as well as RAID controller and NAS boxes to TweakTown as he looks to provide an accurate test bed to make your purchasing decisions easier.

We openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion. If any company representative wishes to respond, we will publish the response here. Please contact us if you wish to respond.

Related Tags