The Samsung SSD 850 EVO mSATA/M.2 Review
by Kristian Vättö on March 31, 2015 10:00 AM ESTAnandTech Storage Bench - Light
The Light trace is designed to be an accurate illustration of basic usage. It's basically a subset of the Heavy trace, but we've left out some workloads to reduce the writes and make it more read intensive in general.
| AnandTech Storage Bench - Light - Specs | ||||||||||||
| Reads | 372,630 | |||||||||||
| Writes | 459,709 | |||||||||||
| Total IO Operations | 832,339 | |||||||||||
| Total GB Read | 17.97 GB | |||||||||||
| Total GB Written | 23.25 GB | |||||||||||
| Average Queue Depth | ~4.6 | |||||||||||
| Focus | Basic, light IO usage | |||||||||||
The Light trace still has more writes than reads, but a very light workload would be even more read-centric (think web browsing, document editing, etc). It has about 23GB of writes, which would account for roughly two or three days of average usage (i.e. 7-11GB per day).
| AnandTech Storage Bench - Light - IO Breakdown | |||||||||||
| IO Size | <4KB | 4KB | 8KB | 16KB | 32KB | 64KB | 128KB | ||||
| % of Total | 6.2% | 27.6% | 2.4% | 8.0% | 6.5% | 4.8% | 26.4% | ||||
The IO distribution of the Light trace is very similar to the Heavy trace with slightly more IOs being 128KB. About 70% of the IOs are sequential, though, so that is a major difference compared to the Heavy trace.
| AnandTech Storage Bench - Light - QD Breakdown | ||||||||||||
| Queue Depth | 1 | 2 | 3 | 4-5 | 6-10 | 11-20 | 21-32 | >32 | ||||
| % of Total | 73.4% | 16.8% | 2.6% | 2.3% | 3.1% | 1.5% | 0.2% | 0.2% | ||||
Over 90% of the IOs have a queue depth of one or two, which further proves the importance of low queue depth performance.
The 850 EVO also shines in our Light trace by being the fastest SATA drive we have tested along with the 850 Pro.
The latency is also great despite the capacity, so I have no problem recommending the 850 EVO for basic workloads -- it's only the heavier workloads that bring the smaller capacities to their knees.
Power is again excellent except for the 1TB model. I'm honestly a big surprised that the 850 EVO is so much more power efficient than the 850 Pro despite the fact that MLC NAND should be more power efficient by design.
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cleverdude - Saturday, April 18, 2015 - link
Bench results have not been updated.http://www.anandtech.com/bench/SSD/65
szhosain - Monday, May 4, 2015 - link
On my Lenovo W530 laptop (about 3 years old now), I just installed a Samsung 850 EVO MSATA 1TB card, and ATTO shows me poorer numbers than seen here. About 267 MB/sec for write and 280 MB/sec for read when it peaks. My 2.5" SSD drives (from OCZ) in the same system are well over 500 MB /sec.Does this perhaps mean that the MSATA interface on this laptop is limited to 3 GB/sec rather than the 6 GB /sec on the standard SATA interfaces?
That would be quite irritating!
Ethos Evoss - Sunday, June 21, 2015 - link
When it comes to mSATA or M.2 connected to SATA III there is no point purchase stupid expensive SSDs as they will perform same as cheapest ones ..So best mSATA/m.2 SSD for SATA III use is the plextor or mushkin (i preffer plextor) which cost less and has great performance
Andrew Field - Wednesday, August 5, 2015 - link
This Samsung SSD 850 EVO mSATA constantly overheats. This is especially the case when copying large files. It rises about 10C every 30-60 seconds, and does not stop until its own overheating protection kicks in. This occurs when it is in a laptop or in an external enclosure (even when open and exposed to the air).Initially I thought I had a bad piece of hardware, but I tested 5 separate units with consistent results.
If anyone decides to test this out, I did the following:
- Step 1: Select a folder with at least 100GB of data
- Step 2: Copy said folder to a new folder (on the same Samsung SSD 850 EVO mSATA)
- Step 3: Monitored the temperature
Result: The temperature begins rising sharply in a few seconds, and does not stop rising until the SSD engages its overheating protection.
greywarden - Thursday, September 17, 2015 - link
I was about to purchase (4) 250GB 850 EVO mSATA drives to put in an Addonics quad mSATA PCIe card, but seeing the latency numbers on the drive has me concerned. Should I look into purchasing a pair of the 500GB models instead? Have the pausing and crashing problems been solved with the 1TB model yet?payamfi - Tuesday, January 19, 2016 - link
Hi guys i wanna buy a memmory for my n551jx i can not decide what to buy msata evo mini or ssd evo pro can anyone help me out?fabbrimichele75 - Friday, March 25, 2016 - link
Would it be possible to know the temperature when the disk is in idle and full load?I'm mainly interested in the M.2 version.
I'm asking because I wanted to mount it on an NUC 6i5 that seems to be sensitive to high temperature.
yolomolo - Tuesday, April 19, 2016 - link
Can i get some advice from you PRO, should i better go get mSata : Samsung EVO 850 or CRUCIAL MX200 ?