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Asynchronous say, “what?” – By: Chris Hustrulid

What is the difference between Axiom’s Async and Sync Solid State Drives?  There is a lot of misinformation about solid state drives. Let’s clear up the Async VS. Sync argument right here, right now.


Synchronous & Asynchronous


Most manufacturers are releasing two models of products based on the SF-2281 SATA III controller.  These products differ by the type of flash used, ONFi 2.x synchronous and ONFi 1.0 asynchronous NAND flash.  I personally use Axiom, so I will shamelessly plug them.


(From The Axiom Signature III SSD is tailored for PC desktop, notebook, and mobility products. Utilizing the latest SandForce® flash controllers with premium quality NAND flash and a SATA III interface combines the best-in-class design, with 6Gb bandwidth. Offered with flexibility in mind, the Signature III SSD provides four different capacity options based on your storage requirements. Axiom also provides two NAND flash types to support individual performance and budget demands. The Asynchronous flash based Signature III SSD is designed for high performance applications with a value-based budget. Synchronous flash used in the Signature III SSD version targets premium performance applications with 15% faster write speeds when compared to the Asynchronous. Providing a superior storage solution, solid-state drives have no moving parts, zero latency, are virtually shockproof, and consume less power than standard hard drives. Engineered for the highest levels of performance, the Axiom Signature III SSD provides advanced free space management, ultra-efficient flash memory block management and wear leveling. The Signature III SSD delivers the ultimate increase in performance with the greatest degree of reliability and durability.


The devil is in the details. Both flash types use a 25nm die package size.  The technical term is ONFi 2.x (synchronous) and ONFi 1.0 (asynchronous).  ONFi 2.x uses a central timing circuit and moves data on both the rise and fall of the signal wave.  This is similar to double data rate random access memory (DDR RAM).  ONFi 2.0 is capable of delivering speeds up to 133MB/s but ONFi 1.0 is limited to just 50MB/s. 


On paper it sounds like one is twice as fast as the other but due to the total SSD architecture, the real world benefit is much less.  If you read all of that you are probably a single male in his late twenties, and cat owner.  Congratulations you are now smarter than most of your friends.  Supplement your bragging and recommend how they spend their money.  Check out Axiom’s SSD drives!


Chris Hustrulid

(866) 921-3858 x202



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