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JMicron JMF667H Firmware Preview Testing with L85A, L85C and A19 Flash

By: Chris Ramseyer | SSDs in Storage | Posted: Jun 2, 2014 2:45 am

Final Thoughts




We were surprised when JMicron reached out to us directly for this article. We work closely with all of the other flash controller manufacturers but have never met with or even spoken directly to JMicron. During our testing, nothing really stuck out as being all that impressive until we started running real-world applications testing. With the flash clean, the JMF667H is a very good controller, but the controller needs to be paired with the right flash. At this time, that means Toshiba A19 Toggle 2.0 and in a larger capacity size.


On the retail side, we've already tested two products with the JMF667H controller. The first resulted in decent mainstream performance at a low price point. The first test was on the Kingfast C-Drive F8. Our second JMF667H review came from the Transcend SSD340, and its performance was significantly slower. We've spoken with Transcend several times about the issue and expect a new firmware at some point from the company.


JMicron's new firmware is much better than the retail drives we've tested. The new firmware paired with Toshiba A19 in 240GB capacity is very strong, but only under the right conditions. JMicron managed to increase the relatively clean performance, but with the dirty flash, performance suffers greatly.


The one thing that really sticks out in my mind is this fact. JMicron is just now getting good performance from the company's SATA controller, but at this time, others like Marvell, Phison, and SandForce are shifting engineers over to PCIe based controllers. It's better late than never, but clearly JMIcron is still trailing the pack. That could change now that the company is willing to reach out to third-party testers and get our feedback.


Time will tell, but JMicron's enthusiasm to get this article on the site tells us the company is ready to work to get to a leadership position.

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