Notes; Windows 7 Compatibility Note - OWC Mercury Helios 2 Assembly Manual & User Manual

2. If you would like to secure the Thunderbolt cables to the Helios 2, use a Phillips
screwdriver to install the optional Thunderbolt cable lock, as shown below. Note that
the Thunderbolt cable lock is not compatible with optical Thunderbolt cables. If you are
using one or more optical Thunderbolt cables, skip this step.
3. Make any necessary cable connections to the PCIe cards you have installed.
4. Connect the power adapter to the Helios 2 and into a power outlet.

2.3 NOTES

• The Helios 2 does not have an on/off switch. As long as the power supply is connected,
the Helios 2 will turn on when it receives a data signal through the Thunderbolt cable.
If there is no Thunderbolt cable connected, or if the computer is off or in a sleep or
hibernation mode, the Helios 2 will turn off.
• Thunderbolt chains can contain up to six total Thunderbolt devices.
• Make sure that all installed PCIe cards are Thunderbolt compatible, either natively or
through a Thunderbolt-compatible driver from the manufacturer.
• Never install a PCIe card while the Helios 2 is connected to power or to a computer.
Doing so carries a risk of injury as well as damage to the PCIe card, the Helios 2, and
the computer.
• While the Helios 2 supports up to two PCIe cards, it can be used with a single PCIe
card installed. If installing only one card, it does not matter which PCIe slot is used.

2.3.1 Windows 7 Compatibility Note

Windows 7 has limited compatibility with the Helios 2. When using the Helios 2 in
Windows 7, only one PCIe card may be installed. If two cards are installed, only one will be
recognized by the operating system. Later Windows versions do not have this limitation.
OWC DIGITAL - MERCURY HELIOS 2
8
DEVICE SETUP