
Hoofddorp,March2011.
RadeonHD6990,itemcodeCGAX‐69996,support.
Installation
Foroptimalperformance,pleaseensureone(1)ormoreemptyexpansionslotsseparateseachAMD
Radeon™HD6990graphicscardinadualmodeAMDCrossFireX™technologyconfiguration.
Dual‐BIOSSupport
TheClub3DRadeon™HD6990graphicscardfeatures
dual‐BIOScapabilities.Thisfeatureiscontrolled
bytheUnlockingSwitch,whichtogglesbetweenthefactory‐supportedPerformanceBIOSof375W
(BIOS1),andanExtremePerformanceBIOS(BIOS2)thatcanpotentiallyunlockhigherclockspeedsand
upto450Wofmind‐blowingperformance!
Caution:
Donotusethe450Wsetting
unlessyouarefamiliarwithoverclockingandareusinghigh‐qualitysystem
componentstoensuremaximumsystemstability.Ifyouencountersysteminstability orother
unexpectedsystemperformancewhileusingthe450Wsetting,pleasecheckthespecsofyourSwitching
PowerSupplytomakesureitiscapabletosupplysufficient
powerforyoursystemandgraphiccard.
Club3Dadvisestousetheir850WattPowerSupplyorsimilarspecification.Club3D‘s,CSP‐D850CB
SwitchingPowerSupplyhasatotalof136Amperesavailable,dividedoverfour12Voltlines,whichis
enoughforyoursystemtooperateinstablemanner
withthis6990GraphicsBoard.
ThefollowingproceduredescribeshowtoswitchbetweenBIOSsettingsusingtheUnlockingSwitchon
yourClub3DRadeon™HD6990graphicscard.
1.LocatetheyellowcautionstickeradjacenttotheAMDCrossFireX™connectoronyourClub3D
Radeon™HD6990graphicscard.Thisstickercovers
theUnlockingSwitchandmustberemoved
toaccessandchangedual‐BIOSswitchpositions.
2.WARNING:Beforeproceeding,thoroughlyreviewthedocumentationforyourAMDClub3D
HD6990graphicscardandassurethatyourcomputermeetsallminimumsystemrequirements.
3.RemovethestickerandsettheUnlockingSwitch
tothedesiredsetting:
Position1—450WExtremePerformanceBIOS(BIOS2).
Position2(shippingposition)—375Wfactory‐supportedPerformanceBIOS(BIOS1).