User’s Manual

1-10
Chapter 1: Product introduction
• InsingleVGAcardmode,usethePCIe3.0x16_1slot(gray)foraPCIExpressx16
graphics card to get better performance.
• WerecommendthatyouprovidesufcientpowerwhenrunningCrossFireX™mode.
• ConnectachassisfantothemotherboardconnectorlabeledCHA_FAN1/2when
usingmultiplegraphicscardsforbetterthermalenvironment.
• HyperM.2X16cardispurchasedseparately.
• EnabletheHyperM.2X16cardunderBIOSsettings.
VGA configuration
PCI Express operating mode
PCIe 3.0 x16_1 (gray)
PCIe 3.0 x16_2 (black,
x4 mode)
Single VGA/PCIe card
x16(Recommendedforsingle
VGAcard)
N/A
Dual VGA/PCIe cards
x16 x4
Hyper M.2 X16 card
configuration
PCI Express 3.0 operating mode
PCIe 3.0 x16_1 (gray) PCIe 3.0 x16_2 (black)
3 Intel
®
SSDs on CPU support x8+x4+x4 N/A
1.6 Headers
1. Clear RTC RAM (2-pin CLRTC)
ThisheaderallowsyoutocleartheRealTimeClock(RTC)RAMinCMOS.Youcan
cleartheCMOSmemoryofdate,time,andsystemsetupparametersbyerasingthe
CMOSRTCRAMdata.TheonboardbuttoncellbatterypowerstheRAMdatain
CMOS,whichincludesystemsetupinformationsuchassystempasswords.
ON
OFF
CLRTC
+3V_BAT GND
PIN 1
PRIME Z390-P Clear RTC RAM