Q. My PCIe card has lower performance than expected when installed
in Helios.
•Thunderboltoersupto10Gb/sbandwidthforPCIe.Thisis
morethanenoughbandwidthformostcards.Somecards,
however,mayrequiremorethan10Gb/sofbandwidthandmay
notoperateatfullspeed.
•ConnectingmultipledevicesinaThunderboltchaincanaect
theoverallperformance.EachdeviceaddedtotheThunderbolt
chainwilladdlatencyandreducethebandwidthavailableinthe
chain.Higherperformingdevices,suchasHelios,shouldbeas
closetothebeginningofthechainaspossible,closesttothe
computer.
oMoveHeliostothebeginningofthechain,closesttothe
computer.
oRemoveonedeviceatatimefromtheThunderboltchain
tondthearrangementthatprovidesthebest
performanceforyourneeds.
Q. I updated to a newer version of OS X and now Helios doesn’t work.
•Heliosisdriverless;nodriverisneededfortheenclosureitself.
•PCIecardsthatarenotAHCIcompliantrequireThunderbolt-
awaredrivers.ThesemaybebrokenbynewerMacOSXversions.
oCheckwiththePCIecard’smanufacturertoverifythe
currentdriveriscompatibleorforanupdateddriver
beforeupgradingtheMacOSXversion.
Q. I connected the OWC Mercury Helios to my Mac, but it did not
power up and is not being seen in System Information.
1.Checkthepoweroutletwithaknown-gooddevicesuchasa
lamp.
2.Checktheportonyourcomputertomakesureitisa
Thunderboltport.Alsocheckthecableyouareusingtomake
sureitisaThunderboltcable.
MiniDisplayPort(MDP)hasthesamephysicalconnectionas
Thunderbolt.HelioswillnotworkconnectedtoaMDPportor
withaMDPcable.
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