SATA Express pre-test

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POSTER: computer news   ||   SATA EXPRESS PRE-TEST	DATE:2014-03-14
AnandTech published extensive article entitled Testing SATA Express and why we need a fast SSD. First, more efficient drives can quickly perform the task , reducing the average consumption and extend battery life .  Second, work with video streaming resolution 4K (3840 x 2160, 12-bit RGB) in the case of uncompressed video requires bandwidth to 900 MB / s.  In the case of processing multiple streams of compressed video immediately even exceed the capabilities of modern interfaces.  Of course, there is always a RAID, but it is more expensive than a single high-speed SSD.  Third, should you move to a software interface AHCI (Advanced Host Controller Interface) interface NVMe (Non-Volatile Memory Express).  The main requirement is to be achieved, this decrease delays when accessing SSD from 6 ms to 2.8 ms.  Also, due to be fully used NVMe processor, since the depth of the queue and the team expanded to 64 thousand operations. In the short term SSD become faster by switching to interface SATA Express (SATAe).  Resource received for testing of pre-production motherboard ASUS - modification Z87 Deluxe controller SATAe ASMedia ASM106SE.  As a test used SSD drive Plextor 256GB M6e PCIe SSD (Controller Marvell 88SS9183), which has an interface PCIe 2.0 x2.  To simulate the interface SATAe used a special daughterboard.  As demonstrated by testing, delays in handling the processor to drive almost was not.  Both involved the line PCI Express 2.0 work at speeds close to effective.   Add to interface SATAe on board was the pilot used a composite of three independent cable connectors, which in the final version will become a cable with a common block.  SATA-drives for compatibility cables continue, whereas PCIe-standard drives SATAe need extended cables.  Also, these cables will receive an additional connector for external power supply as standard SATAe not available supply voltage through a common interface, as was done in the case of a familiar interface PCI Express.  This means that the cables are a bit more expensive . Related Products :

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