JMicron JMF667H Reference Design (128GB & 256GB) Review
by Kristian Vättö on May 29, 2014 9:00 AM ESTPower Consumption
The JMF667H supports both DevSLP and slumber power states. Unfortunately we don't have the equipment to test DevSLP power (yet) but we do have the necessary equipment for slumber power testing. For some reason, the 128GB versions drew a lot more power compared to the 256GB Toshiba model. I tested the 128GB drives twice to make sure there was no measuring error but both times the results were similar. Anyway, the slumber power especially for the 256GB Toshiba drive is very impressive. Having a 4-channel design can certainly help to cut down power consumption and the JMF667H turns out to be more efficient than the latest Marvell silicon.
Power consumption under load is also among the lowest we have tested and the JMF667H stays below three watts at all times.
The 256GB IMFT model wouldn't power on during power tests for some weird reason, so unfortunately I don't have power figures for it. It still functioned normally when plugged straight into the power supply, so I don't think there is anything wrong with the drive itself. I've had similar issues with some drives and it seems to be related to the extra resistance caused by the multimeter and additional wiring.
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mflood - Thursday, May 29, 2014 - link
Looks like a great product for last year. This might help JMicron capture some of the OEM market - maybe even some budget enthusiast SSDs. What JMicron didn't do was swoop in with a M2 x4 PCIExpress controller. I'm done with 6Gbps SATA.romrunning - Thursday, May 29, 2014 - link
Ahhhh.... JMicron - like a phoenix from the ashes. Fool me once, shame on you. Fool me twice...Oh well, someone has to be at the bottom of the barrel.
romrunning - Thursday, May 29, 2014 - link
I guess their selling point would be that they're cheaper than the Crucial M500. So if pricing is all-important to you (and why are you buying a SSD if price is all-important), then they would be a contender.The_Assimilator - Thursday, May 29, 2014 - link
Please stop insulting barrels.moridinga - Thursday, May 29, 2014 - link
"The JMF667H is not perfect and there are a couple of things I would like to see. The first one is support for TCG Opal 2.0 and IEEE-1667 encryption standards."IEEE-1667 is not an encryption standard. Perhaps you meant IEEE-1619
Kristian Vättö - Thursday, May 29, 2014 - link
Nope. IEEE-1667 is for storage devices, at least the version I'm looking at.http://www.ieee1667.com/download/informational-doc...
moridinga - Friday, May 30, 2014 - link
Yes, it is authentication and discovery for storage devices (particularly removable/portable ones). It says nothing about encryption.Gigaplex - Saturday, May 31, 2014 - link
IEEE-1667 is a requirement for Microsofts Bitlocker eDrive, which is encryption.KAlmquist - Thursday, May 29, 2014 - link
Contrary to the history given in the introduction, it was with the the Indilinx "barefoot" controller that was the game changer. Once Indrilinx entered the market, SSD's based on the J-Micron controller could only be sold to consumers who didn't understand what they were buying. The name J-Micron became toxic because if you wanted to advise somebody on buying an SSD, your first and last words would be, "whatever you do, don't buy and SSD with a J-Micron controller."In contrast, Sandforce's first generation controller was an incremental improvement over what came before it. There's nothing wrong with that, but the term "game changer" doesn't apply.
HisDivineOrder - Thursday, May 29, 2014 - link
Seems like that early history explanation really misses the point that Indilinx was the first real competition to Intel back then.Sandforce came along and was the first company to put Intel down. But Indilinx was the first company that convinced people they could live with non-Intel SSD's and not... be JMicron'ed.