Sony VAIO Pro 13 Ultrabook M.2 Native PCIe SSD Review – 1GB/s Performance Fastest Ultra Speed To Date


A few weeks back, we published our review of the Sony VAIO Pro 13 ultrabook where we discovered that there were two different configurations of the VAIO being shipped, that with a SATA 3 M.2 SSD and that with a native M.2 PCIe SSD.  Not only did the system that we received contain a SATA M.2 SSD, but also, a quick check of the internet revealed that there were several Sony VAIO Pro 13 customers just as surprised…and disapppointed. In subsequent conversations with Sony, we learned that certain pre-configured Sony Pro 13 models shipped with the M.2 SATA SSD, vice the native M.2 PCIe SSD.

Just as a point of clarification, M.2 is the official name give to these new ‘gumstick’ style SSDs and replaces the former working term of NGFF (Next Generation Form Factor). M.2 is derived from the female M.2 connector that can accomodate either male connector shown below, the PCIe interface represented by the left connector and the SATA 3 interface represented by the right.  The interface refers to the electrical connection so a SATA 3 M.2 SSD has a SATA 3 electrical interface which transfers data through the SATA 3 port (550MB/s), whereas a PCIe M.2 SSD has a PCIe electrical interface that connects via the PCIe lanes (500MB/s per lane).

M.2 Differences


This is not the first time that something similar to this has happened and, for the most part, its occurrence is the result of the lack of SSD knowledge today’s consumer has.  For instance, most are unaware that SSD contained systems typically start in 15 seconds, are visibly faster than HDD systems, are completely silent, much cooler, have a longer battery life, and are much less likely to crash if a portable system is dropped.  Knowing this, should it be displayed that a system contains a SATA M.2 SSD, capable of speeds of just over 500MB/s, rather than the advertised native M.2 PCIe SSD, capable of more than twice that speed at 1.2GB/s?  We think so.



SATA 3 has a bottle neck that restricts data speeds to just over 500MB/s, whereas, PCIe 2.0 can provide speeds more than twice that. Depending on whether your VAIO Pro 13 was a standard or customized configuration, SSD data transfer may occur through the SATA port (SATA 3 interface) or the PCIe lanes (PCIe interface).  Examining the Samsung XP941 M.2 PCIe SSD that is contained in systems such as the Pro 13 and 2013 MBA (reviewed), it utilizes 4 (x4) PCIe lanes which could allow speeds up to 2GB/s. We were able to get our hands on a XP941 for our own testing, where it reached speeds of 1.2GB/s and over 100K IOPS.  To offer an idea of the performance we are speaking of, this chart depicts performance of the top 5 single form factor SSDs we have ever tested:

M.2 Comparison 2

Looking at this chart, the performance increase of the XP941 is obvious.  Not seen here are the IOPS results, all except the Samsung XP941 (Mac) being very close to, or just over, the 100,000 read IOPS mark.  While in a Mac environment, the XP941 topped out at an unheard of 118807 read IOPS.


As we covered the exterior and interior components of the Sony VAIO Pro 13 in our previous report, we will only glance over a few of the highs and lows that we noted in that report.  The Sony VAIO Pro 13 is the smallest and lightest 13.3″ ultrabook on the market today, at just .68″ high and 2.34lbs, this the inevitable result of its carbon fibre exterior.  Not only does it include a very attractive 1920x1080p IPS touchscreen with  TRILUMINOS display, but also, it can be configured with a 4th gen Intel® Core™ i5-4200U (1.60GHz / 2.60GHz) or i7-4500U (1.80GHz / 3.00GHz) processor, 4 or 8GB DDR3L-1600MHz memory, a 128, 256 or 512GB SSD.

Vaio Open Screen On

Although choosing a pre-configured system may result in your receipt of this system with a SATA M.2 SSD, vice M.2 PCIe SSD, lies at the top of our list of concerns, we also found that the Sony VAIO Pro 13 is not absent of heat or fan noise with the systems fan running constantly.  The heat vents are on the left side of the unit so, when resting on your lap during work or late night use on the couch, you will definitely feel the heat on the left side of the Pro 13.  Even with this constant fan use, testing of both received Sony VAIO systems resulted in over 6 hours battery life through constant and typical use.

Something else that we should point out is that the memory is integrated into the system board and not removable.  For this reason, we would strongly advise that the upgrade from 4 to 8GB during initial configuration is a must.  Let’s take a closer look at the Samsung XP941 M.2 PCIe SSD:


Looking at the XP941, the front displays the Samsung 3-core eight channel MDX (300MHz) controller which is custom designed for PCIe and eliminates the bottlenecks seen in SATA 3.  Beside the controller is 512MB LP (low power) DDR2 Samsung DRAM cache, along with 2 modules of Samsung’s 64Gb MLC NAND flash memory, each module having a RAW capacity of 128GB.

XP941 256GB PCB Front

Total available user capacity is slightly less than 256GB capacity once the SSD has been formatted and system files have been installed.  The user can expect somewhere in the area of 221GB of available storage space.