Gigabyte GA-Z170X-Gaming GT (rev. 1.0) Инструкция онлайн [2/132] 529794

Motherboard

GA-Z170X-Gaming GT

Aug. 20, 2015

Motherboard

GA-Z170X-Gaming GT

Содержание

Ga z170x gaming gt 1
Rev 1002 12me z17xggt 1002r 1
User s manual 1
Copyright 3
Disclaimer 3
Documentation classifications 3
Identifying your motherboard revision 3
Box contents optional items 4
Chapter 1 hardware installation 4
Chapter 2 bios setup 9 4
Chapter 4 drivers installation 3 4
Chapter3configuringaraidset 7 4
Ga z170x gaming gt motherboard layout 4
Table of contents 4
1 bios update utilities 5 5
1 qualcom 5
2 app center 0 5
2 configuringaudioinputandoutput 12 5
3 smart switch 10 5
3 troubleshooting 120 5
4 debug led codes 123 5
Atheros killer network manager 11 5
Chapter 5 unique features 5 5
Chapter 6 appendix 111 5
Regulatorystatements 127 contact us 131 5
Box contents 6
Optional items 6
Ga z170x gaming gt 7
Ga z170x gaming gt motherboard layout 7
Note for debug code information please refer to chapter 6 7
1 installation precautions 9
Chapter 1 hardware installation 9
2 product specifications 10
2 productspecifications 10
3 1 installing the cpu 14
3 installing the cpu and cpu cooler 14
3 2 installing the cpu cooler 16
4 1 dual channel memory configuration 17
4 1 dualchannelmemoryconfiguration 17
4 installing the memory 17
4 2 installing a memory 18
5 installing an expansion card 19
6 setting up amd crossfir 20
6 setting up amd crossfire nvidia sli configuration 20
A system requirements 20
B connecting the graphics cards 20
C configuringthegraphicscarddriver 20
Configuration 20
7 back panel connectors 21
Displayport 21
Hdmi port 21
Ps 2 keyboard mouse port 21
Usb 3 2 port 21
22 hardware installation 22
Center subwoofer speaker out 22
Headphone 22
Intothisportfirst 22
Line in mic in 22
Line out 22
Note theusbflashdrivemustbeausb2 flashdrive 22
Optical s pdif out connector 22
Rear speaker out 22
Refertotheinstructionsonsettingupa2 5 channelaudioconfigurationinchapter6 configuring 2 5 channel audio 22
Rj 45 lan port lan1 22
Rj 45 lan port lan2 22
The gigabit ethernet lan port provides internet connection at up to 1 gbps data rate the following describes the states of the lan port leds 22
The line in mic in jack use this audio jack for line in devices such as optical drive walkman microphone etc 22
The line out jack use this audio jack for a 2 channel speaker this jack can be used to connect front speakersina5 channelaudioconfiguration 22
Thereversibleusbportsupportstheusb3 specificationandiscompatibletotheusb3 2 specifica tion use this port for usb devices 22
Theusb3 portsupportstheusb3 specificationandiscompatibletotheusb2 1 specification usethisportforusbdevices beforeusingq flashplus makesuretoinserttheusbflashdriv 22
Theusb3 type aportsupportstheusb3 specificationandiscompatibletotheusb3 2 1 specification usethisportforusbdevices 22
This audio output jack supports audio amplifying function for better sound quality it is recommended that you connect your headphone to this jack 22
This connector provides digital audio out to an external audio system that supports digital optical audio before using this feature ensure that your audio system provides an optical digital audio in connector 22
Usb 3 2 port white 22
Usb 3 type a port red 22
Usb type 22
Usethisaudiojacktoconnectcenter subwooferspeakersina5 channelaudioconfiguration 22
Usethisaudiojacktoconnectrearspeakersina5 channelaudioconfiguration 22
2 x default 23
23 hardware installation 23
8 onboard buttons and switches 23
Audio gain control switches 23
Backupbios bootfromthebackupbios 23
Bbios_led thebackupbiosisactive 23
Bios led indicators 23
Bios switches and bios led indicators 23
Bios_sw 23
Cap_sw_f front audio line out 23
Cap_sw_r headphone out 23
Dual bios 23
Mainbios bootfromthemainbios 23
Mbios_led themainbiosisactive 23
Single bios 23
The switches allow for audio gain control for the line out jack on the back panel please make sure all of the dipsaresetinthesamepositionandaresetaccordingtoyourheadphonespecification actualeffectsmay varybythedevicebeingused 23
Thebiosswitch bios_sw allowsuserstoeasilyselectadifferentbiosforbootuporoverclocking helpingto reduce bios failure during overclocking the sb switch allows enabling or disabling of the dual bios function theledindicator mbios_led bbios_led showswhichbiosisactive 23
Eco button and oc button 24
Quick buttons 24
25 hardware installation 25
9 changing the operational amplifier 25
9 changingtheoperationalamplifier 25
For purchasing the ic extractor and op chip please contact the local dealer 25
Pin no definition 25
Step 1 use an ic extractor to carefully grip the ic s sides and extract it from the socket 25
Step 2 align the notch on your op chip with the notch on the socket and gently press the chip into the socket until seated 25
Steps connecttheredleadofthemultimetertothepin1 power ofavoltage measurementpointandtheblackleadtothepin2 ground 25
Use a multimeter to measure the following motherboard voltages you can employ the following way to measure component voltages 25
Voltage measurement points 25
10 internal connectors 26
2 atx_12v_2x4 atx 2x4 12v power connector and 2x12 main power connector 27
27 hardware installation 27
The 12v power connector mainly supplies power to the cpu if the 12v power connector is not connected the 12v power connector mainly supplies power to the cpu if the 12v power connector is not connected the computer will not start 27
To meet expansion requirements it is recommended that a power supply that can withstand high powerconsumptionbeused 500worgreater ifapowersupplyisusedthatdoesnotprovidethe required power the result can lead to an unstable or unbootable system 27
With the use of the power connector the power supply can supply enough stable power to all the components onthemotherboard beforeconnectingthepowerconnector firstmakesurethepowersupplyisturned off and all devices are properly installed the power connector possesses a foolproof design connect the power supply cable to the power connector in the correct orientation 27
28 hardware installation 28
4 cpu_fan sys_fan1 2 3 fan headers 28
All fan headers on this motherboard are 4 pin most fan headers possess a foolproof insertion design when connecting a fan cable be sure to connect it in the correct orientation the black connector wire is thegroundwire thespeedcontrolfunctionrequirestheuseofafanwithfanspeedcontroldesign for optimum heat dissipation it is recommended that a system fan be installed inside the chassis 28
Be sure to connect fan cables to the fan headers to prevent your cpu and system from overheat 28
Cpu_opt water cooling cpu fan header 28
Ing overheating may result in damage to the cpu or the system may hang 28
The fan header is 4 pin and possesses a foolproof insertion design when connecting a fan cable be sure toconnectitinthecorrectorientation theblackconnectorwireisthegroundwire thespeedcontrol function requires the use of a fan with fan speed control design 28
Thesefanheadersarenotconfigurationjumperblocks donotplaceajumpercapontheheaders 28
29 hardware installation 29
Each sata express connector supports a single sata express device 29
For how to turn on off the i o shield led indicators refer to the instructions on in chapter 2 bios setup peripherals or chapter 5 unique features app center ambient led 29
Led_io i o shield audio led power connector 29
Pin no definition 29
Sata express sata express connectors 29
Step 1 install the included i o shield into the chassis for actual installation please refer to the user guideforyourchassis 29
Step 2 place the motherboard into the chassis aligning the back panel connectors with the installed i o shield connect the power cable from the i o shield to the led_io connector on the motherboard 29
The power connector provides power to the leds on the i o shield on the motherboard back panel 29
30 hardware installation 30
Asm1061 chip 30
Chipsetsupportsraid0 raid1 raid5 andraid10 refertochapter3 configuringaraidset forinstructionsonconfiguring araidarray 30
Pin no definition 30
Sata3 0 1 2 3 4 5 sata 6gb s connectors controlled by inte 30
Sata3 6 7 sata 6gb s connectors controlled by asmedi 30
The sata connectors conform to sata 6gb s standard and are compatible with sata 3gb s and sata 1 gb s standard each sata connector supports a single sata device 30
The sata connectors conform to sata 6gb s standard and are compatible with sata 3gb s and sata 1 gb s standard each sata connector supports a single sata device the inte 30
To enable hot plugging for the sata ports refer to chapter 2 bios setup peripherals sata configuration formoreinformation 30
Z170 chipset 30
31 hardware installation 31
Chipset pleasenotethatanm pciessdcannotbeusedtocreatearaidseteitherwith anm satassdorasataharddrive tocreatearaidarraywithanm pciessd youmustset uptheconfigurationinuefibiosmode refertochapter3 configuringaraidset forinstructions onconfiguringaraidarray 31
Follow the steps below to correctly install an m ssd in the m connector 31
M2d_32g m2h_32g m socket 3 connectors 31
Select the proper hole for the m ssd to be installed and refasten the screw and nut 31
Step 1 use a screw driver to unfasten the screw and nut from the motherboard locate the proper mount ing hole for the m ssd to be installed and then screwthenutfirst 31
Step 2 slide the m ssd into the connector at an angle 31
Step 3 press the m ssd down and then secure it with the screw 31
Step 4 the installation is completed as shown in the picture above 31
Them connectorssupportm satassdsandm pciessdsandsupportraidconfigurationthrough the inte 31
32 hardware installation 32
Ahci mode m2d_32g m connector 32
M2h_32g m connector 32
Note thepciex4ssdrunsatx2speed 32
Raid mode m2d_32g m connector 32
Suretorefertothesupportedconfigurationsinthetablesbelowaccordingtotheoperatingmodeofyour satacontroller ahcimodeorraidmode 32
Wheninstallingdifferenttypesofm ssds includingsatassds pciex4ssds andpciex2ssds be 32
F_panel front panel header 33
34 hardware installation 34
F_audio front panel audio header 34
F_usb30_1 f_usb30_2 usb 3 2 headers 34
Highdefinitionaudio hd youmayconnectyourchassis front panel audio module to this header make sure the wire assignments of the module connector match the pin assignments of the motherboard header incorrect connection between the module connector and the motherboard header will make the device unable to work or even damage it 34
Prior to installing the usb front panel be sure to turn off your computer and unplug the power cord from the power outlet to prevent damage to the usb front panel 34
Some chassis provide a front panel audio module that has separated connectors on each wire instead of a single plug for information about connecting the front panel audio module that has different wire assignments please contact the chassis manufacturer 34
The front panel audio header supports inte 34
Theheadersconformtousb3 2 specificationandeachheadercanprovidetwousbports forpur chasing the optional 3 front panel that provides two usb 3 2 ports please contact the local dealer 34
35 hardware installation 35
Donotplugtheieee1394bracket 2x5 pin cableintotheusb2 1 header prior to installing the usb bracket be sure to turn off your computer and unplug the power cord 35
F_usb1 f_usb2 usb 2 1 headers 35
From the power outlet to prevent damage to the usb bracket 35
Theheadersconformtousb2 1 specification eachusbheadercanprovidetwousbportsviaan optional usb bracket for purchasing the optional usb bracket please contact the local dealer 35
Tpm trusted platform module header 35
Youmayconnectatpm trustedplatformmodule tothisheader 35
36 hardware installation 36
Always turn off your computer and unplug the power cord before replacing the battery replacethebatterywithanequivalentone dangerofexplosionifthebatteryisreplacedwith 36
An incorrect model 36
Bat battery 36
Coma serial port header 36
Contact the place of purchase or local dealer if you are not able to replace the battery by yourself 36
Ofthebattery thepositivesideshouldfaceup 36
Or uncertain about the battery model 36
The com header can provide one serial port via an optional com port cable for purchasing the optional com port cable please contact the local dealer 36
Thebatteryprovidespowertokeepthevalues suchasbiosconfigurations date andtimeinformation inthecmoswhenthecomputeristurnedoff replacethebatterywhenthebatteryvoltagedropstoalow level or the cmos values may not be accurate or may be lost 36
Used batteries must be handled in accordance with local environmental regulations 36
Wheninstallingthebattery notetheorientationofthepositiveside andthenegativeside 36
Clr_cmos clear cmos jumper 37
Chapter 2 bios setup 39
1 startup screen 40
2 the main menu 41
A startup guide default 41
B st mode smart tweak mode 41
C classic mode 42
Classic setup function keys 42
Sample bios version f2c 42
3 m i t 43
Advanced frequency settings 44
Cpu base clock 44
Cpu clock ratio 44
Cpu frequency 44
Cpu upgrad 44
Graphics slice ratio 44
Graphics unslice ratio 44
Host clock value 44
M i t current status 44
Performance upgrad 44
Advanced cpu core settings 45
Cpu clock ratio cpu frequency 45
Cpu flex ratio override 45
Cpu flex ratio settings 45
Intel r turbo boost technology 45
Power limit tdp watts power limit time 45
Turbo rati 45
Uncore frequency 45
Uncore ratio 45
C3 state support 46
C6 c7 state support 46
C8 state support 46
Core current limit amps 46
Cpu eist function 46
Cpu enhanced halt c1e 46
Cpu thermal monitor 46
Hyper threading technology 46
No of cpu cores enabled 46
Package c state limit 46
Advanced memory settings 47
Extremememoryprofile x m p 47
Memory boot mod 47
Memory enhancement settings 47
Memory frequency mhz 47
System memory multiplier 47
System memory multiplier memory frequency mhz 47
Channel interleaving 48
Memory multiplier tweaker 48
Memory timing mode 48
Profileddrvoltage 48
Rank interleaving 48
Advanced power settings 49
Advanced voltage settings 49
Cpu vcore loadline calibration 49
Cpu vcore current protection 50
Cpu vcore protection 50
Cpu vcore pwm switch rate 50
Pwm phase control 50
Vaxg current protection 50
Vaxg loadline calibration 50
Vaxg phase control 50
Vaxg protection 50
Vaxg pwm switch rate 50
Case open 52
Pc health status 52
Reset case open status 52
1st system fan speed control sys_fan1 connector 53
Cpu cpu opt system fan fail warning 53
Cpu cpu opt system fan speed 53
Cpu fan speed control cpu_fan connector 53
Cpu opt fan speed control cpu_opt connector 53
Cpu pch temperature 53
Cpu system pch temperature warning 53
Cpu vcore cpu vccsa cpu vccio ddrvtt channel a b voltage dram channel a b 53
Fan speed percentage 53
System temperature 2nd system temperature 53
Voltage ddrvpp channel a b voltage 3 v 5v pch core 12v cpu vaxg 53
2nd system fan speed control sys_fan2 connector 54
3rd system fan speed control sys_fan3 connector 54
Fan speed percentage 54
3dmark01 enhancement 55
Max link speed 55
Miscellaneous settings 55
4 system information 56
Access level 56
System date 56
System language 56
System time 56
5 bios features 57
Boot option priorities 57
Bootup numlock state 57
Fast boot 57
Full screen logo show 57
Hard drive cd dvd rom drive floppy drive network device bbs priorities 57
Security option 57
Csm support 58
Lan pxe boot option rom 58
Network stack driver support 58
Next boot after ac power loss 58
Ps2 devices support 58
Sata support 58
Usb support 58
Vga support 58
Windows 8 10 features 58
Administrator password 59
Ipv4 pxe support 59
Ipv6 pxe support 59
Network stack 59
Other pci device rom priority 59
Storage boot option control 59
User password 59
6 peripherals 60
Atheros killer e2400 lan chip lan2 60
Audio led 60
Initial display output 60
Intel platform trust technology ptt 60
Led hue 60
Onboard lan controller qualcom 60
Rear panel led 60
Device select 61
Intel r bios guard technology 61
Legacy usb support 61
Offboardsatacontrollerconfiguration 61
Pending operation 61
Sata controller s 61
Sata mode selection 61
Sataconfiguration 61
Security device support 61
Serial port 1 61
Superioconfiguration 61
Tpm 20 interfacetype 61
Trusted computing 2 61
Usb mass storage driver support 61
Usb storage devices 61
Xhci hand off 61
7 chipset 63
Audio controller 63
Audio dsp 63
Dvmt pre allocated 63
Dvmt total gfx mem 63
Gbe lan chip lan1 63
High precision timer 63
Internal graphics 63
Pch lan controller inte 63
Wake on lan 63
8 power management 64
Ac back 64
Power on by keyboard 64
Power on by mouse 64
Power on password 64
Dmi link aspm control 65
Pch aspm 65
Peg aspm 65
Platform power management 65
Power loading 65
Rc6 render standby 65
Resume by alarm 65
S3 save mode 65
Soft off by pwr bttn 65
Usb dac power 65
9 save exit 66
Boot override 66
Exit without saving 66
Load optimized defaults 66
Loadprofiles 66
Save exit setup 66
Saveprofiles 66
1 configuring sata controllers 67
1 configuringsatacontrollers 67
A installing hard drives 67
Before you begin please prepare the following items 67
Chapter 3 configuring a raid set 67
Chapter3 configuringaraidset 67
Raid levels 67
To create a raid set follow the steps below 67
B configuringsatacontrollermodeinbiossetup 68
C 1 uefiraidconfiguration 69
73 configuring a raid set 73
C 2 configuringlegacyraidrom 73
Enter the inte 73
Figure 10 73
Figure 9 73
Legacyraidbiossetuputilitytoconfigurearaidarray skipthisstepandproceedwiththe installationofwindowsoperatingsystemforanon raidconfiguration 73
The main menu screenwillappear figure10 73
Toentertheraidconfigurationutility 73
Configuring a raid set 74 74
Figure 11 74
Figure 12 74
Toproceed 74
75 configuring a raid set 75
Figure 13 75
Figure 14 75
Now youcanproceedtoinstallthesataraid ahcidriverandoperatingsystem 75
Orselect 6 exit in main menu 75
To cancel figure13 75
Whencompleted youcanseedetailedinformationabouttheraidarrayinthe disk volume information section includingtheraidlevel stripeblocksize arrayname andarraycapacity etc figure14 75
Before you begin 76
Configuring a raid set 76 76
Figure 15 76
Figure 16 76
Figure15 76
Figure16 76
Rapidrecovertechnologyprovidesdataprotectionbyallowinguserstoeasilyrestoredataandsystem operationusingadesignatedrecoverydrive withtherapidrecoverytechnology whichemploysraid1 functionality users can copy the data from the master drive to the recovery drive if needed the data on the recovery drive can be restored back to the master drive 76
Recovery volume options inte 76
The recovery drive must have equal or greater capacity than the master drive arecoveryvolumecanbecreatedwithtwoharddrivesonly arecoveryvolumeandaraidarraycannot co exist in the system at the same time that is if you have already created a recovery volume you are unabletocreatearaidarray by default only the master drive can be viewed in the operating system the recovery drive is hidden 76
77 configuring a raid set 77
Figure 17 77
Figure 18 77
On the create volume itemtobegincreatingtherecoveryvolumeandfollowtheon screen instructions to complete 77
Rapidstoragetechnologyutilityintheoperatingsystem on request also allows users to restore the master drive to a previous state 77
Step 4 under sync select continuous or on request figure18 whensetto continuous changes made to the data on the master drive will be automatically and continuously copied to the recovery drive when both hard drives are installed in the system on request allows users to update data from the master drive to the recovery drive manually using the inte 77
Toconfirm figure17 77
Acceleration options thisoptionallowsyoutoviewthestatusofyouraccelerateddrive volume figure20 createdusingtheinte 78
Configuring a raid set 78 78
Figure 19 78
Figure 20 78
Irstutility incaseyouareunabletoruntheinte 78
Toabort 78
Toconfirm 78
2 installing the sata raid ahci driver and operating system 79
A installing windows 79
B rebuilding an array 80
Configuring a raid set 80 80
Rebuildingistheprocessofrestoringdatatoaharddrivefromotherdrivesinthearray rebuildingappliesonly tofault tolerantarrayssuchasraid1 raid5orraid10arrays theproceduresbelowassumeanewdrive isaddedtoreplaceafaileddrivetorebuildaraid1array note thenewdrivemusthaveequalorgreater capacitythantheoldone 80
The following screen appears indicating that an automatic rebuild will be performed after you enter the operating system if you do not enable automatic rebuild on this stage you have to manually rebuild the array in the operating system see the next pageformoredetails 80
Toentertheraid configurationutility thefollowingscreenappearsafteryouentertheraidconfigurationutility 80
Turnoffyourcomputerandreplacethefailedharddrivewithanewone restartyourcomputer 80
Configuring a raid set 82 82
Raidconfigurationutility onthe recovery volumes options menu select enable only recovery disk to show the recovery drive in theoperatingsystem followtheon screeninstructionstocompleteandexittheraidconfigurationutility 82
Rapid storage technology utility and click recover data in manage volume 82
Restoring the master drive to a previous state for recovery volume only whentwoharddrivesaresettorecoveryvolumeinupdateonrequestmode youcanrestorethemaster drive data to the last backup state when needed for example in case the master drive detects a virus you can restore the recovery drive data to the master drive 82
Step 1 select 4 recovery volume options in the main menu of the inte 82
Step 2 go to the manage menu of the inte 82
Step 3 click yes to begin the data recovery 82
Step 4 after the recovery volume is completed the status will display as normal 82
The status item on the left of the screen displays the rebuild progress 82
1 drivers software 83
Chapter 4 drivers installation 83
2 application software 84
3 information 84
1 1 updating the bios with the q flash utility 85
1 bios update utilities 85
A before you begin 85
Chapter 5 unique features 85
B updating the bios 86
1 2 updating the bios with the bios utility 88
A before you begin 88
B using bios 88
C after updating the bios 88
1 3 using q flash plus 89
A before you begin 89
B using q flash plus 89
2 app center 90
Running the app center 90
2 1 easytune 91
Tabs information 91
The easytune interface 91
2 2 system information viewer 92
Tabs information 92
The system information viewer interface 92
2 3 fast boot 93
The fast boot interface 93
Using fast boot 93
2 4 smart timelock 94
The smart timelock interface 94
Using smart timelock 94
2 5 usb blocker 95
The usb blocker interface 95
Using usb blocker 95
2 6 smart keyboard 96
The smart keyboard interface 96
Using smart keyboard 96
2 7 smart backup 97
Creating a backup 97
Recoveringafile 97
Saving the backup to a network location 97
Recovering your system with smart backup 98
2 8 ambient led 99
The ambient led interface 99
Using ambient led 99
2 9 3d osd 100
The 3d osd interface 100
Using 3d osd 100
2 10 cloud station 101
Before you begin 101
Homecloud 101
The homecloud interface 101
Using homecloud 102
Gigabyte remote 103
The gigabyte remote interface 103
Using gigabyte remote 103
Remote oc 104
The remote oc interface 104
Using remote oc 104
Hotspot 105
The hotspot interface 105
Using hotspot 105
2 11 autogreen 106
The autogreen interface 106
2 12 easy raid 107
Disk mode switch 107
A system requirements 108
B using ez smart response 108
Ez smart response 108
A system requirements 109
B using xhd 109
3 smart switch 110
The smart switch interface 110
Using smart switch 110
1 qualcom 111
1 qualcomm atheros killer network manager 111
Applications page 111
Atheros killer network manager 111
Chapter 6 appendix 111
Killer ethernet 111
Network settings 111
System performance 111
2 1 configuring 2 5 channel audio 112
2 1 configuring2 5 channelaudio 112
2 2 creative software suite 112
2 configuring audio input and output 112
2 configuringaudioinputandoutput 112
Creative alchemy 112
Sound blaster recon3di 113
2 3 configuring s pdif out 116
2 3 configurings pdifout 116
2 4 configuring audio recording 117
2 4 configuringaudiorecording 117
2 5 using the sound recorder 119
A recording sound 119
B playing the recorded sound 119
3 1 frequently asked questions 120
3 troubleshooting 120
Appendix 120 120
To read more faqs for your motherboard please go to the support downloads faq page on gigabyte s website 120
121 appendix 121
3 2 troubleshooting procedure 121
If you encounter any troubles during system startup follow the troubleshooting procedure below to solve the problem 121
Appendix 122 122
If the procedure above is unable to solve your problem contact the place of purchase or local dealer for help or go to the support technical support page to submit your question our customer service staff will reply you as soon as possible 122
4 debug led codes 123
Regular boot 123
Recovery 125
S3 resume 125
Our commitment to preserving the environment 127
Regulatory notices 127
Regulatory statements 127
Restriction of hazardous substances rohs directive statement 127
Waste electrical electronic equipment weee directive statement 127
Weee symbol statement 127
Canada industry canada ic notices canada avis d industry canada ic 128
Fcc notice u s a only 128
131 appendix 131
Contact us 131
Appendix 132 132
Gigabyte esupport 132
Tosubmitatechnicalornon technical sales marketing question pleaselinkto http esupport gigabyte com 132

Gigabyte GA-Z170X-Gaming GT (rev. 1.0) Инструкция онлайн [2/132] 529794

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