HP ZBook 17 Especificações descarregar pdf (Página 15)

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Technical white paper | HP ZBook 17 G2 Mobile Workstation

Why the transition from SATA to PCIe?

Today’s SATA HDDs and SATA SSDs have reached a performance ceiling. HDDs are limited by the mechanical nature of the

devices, while SATA SSDs are limited by the 6 Gb/s (600 MB/s) ceiling of the SATA bus. Furthermore, the SATA-I/O working

group made a strategic decision to not enhance the performance of the SATA bus, instead opting to shift focus to the

multi-lane capabilities of PCI Express.

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SATA/SAS 6G

HDDs

SATA SSD: At performance ceiling

SATA HDD: At performance ceiling

MB/s

SSDs

In order to support multi-lane PCIe devices, a new specication was needed to enable performance improvements of

storage in small devices. The PCI Express M.2 specication was created and provides the needed connectivity to the PCIe

bus providing both a signicant performance bump today and performance growth for the foreseeable future.

Introduction to M.2 interface and form factor

M.2 is a specication for internally mounted computer expansion cards and associated connectors. Through dierent

keying the M.2 specication supports multiple functions for add-in cards including such devices as WLAN (Wi-Fi), 3G/

LTE (WWAN), and solid-state drives (SSDs). Exposed buses through M.2 are SATA, PCI Express 3.0, SATA 3.0, and USB 3.0

buses. M.2 storage devices replace mSATA with a denser, more exible physical specication that is most suitable for

SSDs, especially when utilized in small devices.

M.2 PCIe SSD mSATA SSD

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