User Guide for ASRock models including: IMB-1317, IMB-X1317, IMB-X1317-10G, IMB-1317 Micro ATX Motherboard, IMB-1317, Micro ATX Motherboard, ATX Motherboard, Motherboard

IMB-1317 IMB-X1317 IMB-X1317-10G


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IMB-1317
IMB-1317
IMB-X1317
IMB-X1317-10G
The terms HDMI® and HDMI High-Definition Multimedia Interface, and the HDMI logo are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries.

Revision History Date
October 25, 2024 December 24, 2024
January 22, 2025 June 3, 2025

Description First Release Second Release Third Release Fourth Release

Jumpers and Headers Setting Guide

12

3

45 6

7

54 53

Bottom: DP1

Top: COM1

1

1

1 ATX12V1
PWR_COM1 LAN1_2_LED

Bottom: LAN2

Top: LAN1

1 ATX12V2

1 CPU_FAN1

1 CHA_FAN2
PWR_LOSS1 1

ATXPWR1

DDR5_B2 (64 bit, 288-pin module)

DDR5_B1 (64 bit, 288-pin module)

DDR5_A2 (64 bit, 288-pin module)

DDR5_A1 (64 bit, 288-pin module)

52

USB 3.2 Gen2 Bottom: Top: USB3_4 HDMI1 Middle: USB3_3

51 50 49
48
47 46 45
44
43 42 41 40 39 38 37 36

USB 3.2 Gen2 Middle: USB3_2 Bottom: USB3_1

Top: LAN3

Bottom: Thunderbolt
Type-C TC_TB_1

Middle:

Top:

USB 3.2 Gen2 LAN4

USB3_7

USB 3.2 Gen2 Middle: USB3_10 Bottom: USB3_9

Top: LAN5

Bottom: Middle: Top: Mic-in Line-out Line-in

1 TC_TB_2

CHA_FAN3 1
PCIE1

1
1 DACC1
1 1
LAN3_4_LED LAN5_LED1 PWR_BAT1

PCIE2 PCIE3

1

CLRMOS2_CLRMOS1

1

1

JTAG1

BUZZ2

BUZZ1

PCIE4

SPDIF1 1
1 HD_AUDIO1

SPEAKER1 1
1 1
JGPIO_SET1 1 JGPIO_PWR1

LPT_GPIO1

1

M2_M1

1

CHA_FAN1

IMB-1317

1 M2_E1

BATTERY1

1 M2_M2

PSU_SMB1

BLT_PWM2 PANEL1

HEATER1 USB2_13
BLT_PWM1

1
1 1

PLED

HDLED

PWRBTN

RESET

1

1

1

1

1

SATA3_0 SATA3_1

1 1

SATA3_2 SATA3_3

1 1
1 USB3_8
USB3_5 1
M2_B1 1

1

1

1

1 SATA3_6_7

BKT_PWR1 PNL_PWR1 BLT_VOL1 BLT_PWR1 LVDS1

PWR_COM6

PWR_COM3

PWR_COM2

PWR_COM5

PWR_COM4

1

1

1

1

1

COM2 1

COM6 1

COM5 1

COM3 1

COM4 1

1 ESPI1

1

1

SIO_AT1 CI2_1

1 COM3_CC_TTL_SEL1

BIOS ROM
1

SATA3_4_5

8
9 10 11 12 13 14 15
16
17 18
19 20 21
22

35 34 33

32

31

30

2928 27 26 25 24 23

LAN LED Headers 1 : LAN1_2_LED (For LAN1, LAN2 Ports) 43 : LAN3_4_LED (For LAN3, LAN4 Ports)
LAN5_LED1 (For LAN5 Port)

LAN1_2_LED:

LAN2 LED Pin 1 3 5
7

Signal Name LED_ACT+ LED_ACTLED_100-/ LED_1000+ LED_100+/ LED_1000-

Signal Name LED_ACT+ LED_ACTLED_100-/ LED_1000+ LED_100+/ LED_1000-

Pin LAN1 LED 2 4 6
8

LAN3_4_LED:

LAN4 LED Pin 1 3 5
7

Signal Name LED_ACT+ LED_ACTLED_1000-/ LED_2500+ LED_1000+/ LED_2500-

Signal Name LED_ACT+ LED_ACTLED_100-/ LED_1000+ LED_100+/ LED_1000-

Pin LAN3 LED 2 4 6
8

LAN5_LED1:

Pin

Signal Name

1

LED_ACT+

2

LED_ACT-

3

LED_2500-/LED_10000+

4

LED_2500+/LED_10000-

* For IMB-X1317-10G only.

COM Port PWR Setting Jumpers 2 : PWR_COM1 (For COM Port1) 29 : PWR_COM2 (For COM Port2)
PWR_COM3 (For COM Port3) PWR_COM4 (For COM Port4) PWR_COM5 (For COM Port5) PWR_COM6 (For COM Port6) Open : +0V 1-2 : +5V (Default) 2-3 : +12V

2

8

1

7

LAN1_2_LED

2

8

1

7

LAN3_4_LED

1

4

LAN5_LED

1

3

3 : 8-pin ATX 12V Power Connectors

(ATX12V1, ATX12V2)

Pin Signal Name

1

GND

2

GND

3

GND

4

GND

Signal Name Pin

ATX12V

5

ATX12V

6

ATX12V

7

ATX12V

8

8

5

4

1

M.2 Key-M Sockets 18 : M.2 Key-B Socket

4 : M2_M1

(M2_B1)

28 : M2_M2

Pin

Signal Name

1

GND

3

GND

5

PERn3

7

PERp3

9

GND

11

PETn3

13

PETp3

15

GND

17

PERn2

19

PERp2

21

GND

23

PETn2

25

PETp2

27

GND

29

PERn1

31

PERp1

33

GND

35

PETn1

37

PETp1

39

GND

41

PERn0

43

PERp0

45

GND

47

PETn0

49

PETP0

51

GND

53

PEFCLKn

55

PEFCLKp

57

GND

67

NA

69

PEDET

71

GND

73

GND

75

GND

Signal Name

Pin

+3.3V

2

+3.3V

4

NA

6

NA

8

SATA_LED

10

+3.3V

12

+3.3V

14

+3.3V

16

+3.3V

18

NA

20

NA

22

NA

24

NA

26

NA

28

NA

30

NA

32

NA

34

NA

36

NA

38

SMB_CLK

40

SMB_DATA

42

NA

44

NA

46

NA

48

PERST#

50

CLKREQ#

52

WAKE#

54

NA

56

NA

58

SUS_CLK

68

+3.3V

70

+3.3V

72

+3.3V

74

Pin

Signal Name

Signal Name

Pin

1

NA

+3.3V

2

3

GND

+3.3V

4

5

GND

FuLL_Card_Power_off 6

7

USB_D+

W_DISABLE

8

9

USB_D-

NA

10

11

GND

21

NA

23

NA

25

NA

27

GND

29

USB3Rn

31

USB3Rp

33

GND

35

USB3Tn

37

USB3Tp

39

GND

41

PERn0

43

PERp0

45

GND

47

PETn0

49

PETP0

51

GND

53

PEFCLKn

55

PEFCLKp

57

GND

59

NA

61

NA

63

NA

65

NA

67

NA

69

NA

71

GND

73

GND

75

NA

NA

20

NA

22

NA

24

W_DISABLE

26

NA

28

UIM_RESET

30

UIM_CLK

32

UIM_DATA

34

UIM_PWR

36

NA

38

SMB_CLK

40

SMB_DATA

42

NA

44

NA

46

NA

48

PERST#

50

CLKREQ#

52

WAKE#

54

NA

56

NA

58

NA

60

NA

62

NA

64

NA

66

SUS_CLK

68

+3.3V

70

+3.3V

72

+3.3V

74

* For IMB-1317 only.

Chassis FAN Connectors (+12V) 5 : CHA_FAN1 7 : CHA_FAN2 45 : CHA_FAN3

Pin

Signal Name

1

GND

2

+12V

3

CHA_FAN_SPEED

4

FAN_SPEED_CONTROL

4

1

CHA_FAN1

1

4

CHA_FAN2

CHA_FAN3

6 : CPU FAN Connectors (+12V) (CPU_FAN1)

Pin

Signal Name

1

GND

2

+12V

3

CPU_FAN_SPEED

4

FAN_SPEED_CONTROL

1

4

8 : PWR LOSS Header (PWR_LOSS1)

Open : No Power Loss

1

Short : Power Loss (Default) 2

9 : 24-pin ATX Power Input Connector (ATXPWR1)

Pin Signal Name

Signal Name Pin

12

24

1

+3V

+3V

13

2

+3V

-12V

14

3

GND

GND

15

4

+5V

PSON#

16

5

GND

GND

17

6

+5V

GND

18

7

GND

GND

19

8 PWROK_PS

NA

20

9

ATX+5VSB

+5V

21

10

+12V

+5V

22

11

+12V

12

+3V

+5V

23

GND

24

1

13

10 : PSU_SMB1

Pin

Signal Name

1

SMB_CLK

1

2

SMB_DATA

3

SMBALERT#

4

GND

5

5

+3V

· The SMBus connector is for power supply unit.

11 : HEATER1 Header (HEATER1) (Preheat function)

Pin

Signal Name

1

1

Heater PWR (5V/1A)

2

GND

3

NTC (Negative Temperature Coefficient) thermistors

3

· The 10k Ohm NTC thermistor is suggested.

· Deep mode is not supported when the preheat function is enabled.

12 : USB 2.0 Header (USB2_13)

Pin

Signal Name

1

1

USB_PWR

2

USB_D-

3

USB_D+

4

GND

4

13 : System Panel Header (PANEL1)

Pin Signal Name

1

HDLED+

3

HDLED-

5

GND

7

RESET#

9

+5VSB

Signal Name Pin

PLED+

2

PLED-

4

PWRBTN#

6

GND

8

10

1

2

9

10

14 : Brightness Control Voltage Mode

(BLT_PWM2)

1

1-2: +3V (Default) 3
2-3: +5V

15 : Brightness Control Mode (BLT_PWM1)

1-2 : From eDP PWM to CON_LBKLT_CTL

2-3 : From LVDS PWM to CON_LBKLT_CTL

(Default) 1
· Please set to 1-2 when adjusting brightness

by Brightness Control bar under OS.

3

· Please set to 2-3 when adjusting brightness by BLT_VOL1.

SATA3 Connectors

16 : SATA3_0~SATA3_3

22 : SATA3_4~SATA3_7

Pin

Signal Name

1

GND

2

SATA-A+

3

SATA-A-

4

GND

5

SATA-B-

6

SATA-B+

7

GND

SATA3_0 SATA3_1

1

7

7

1

1

7

7

1

SATA3_2 SATA3_3

17 : USB 3.0 Type-A Ports (Vertical)

(USB3_5, USB3_8)

5 1

Pin

Signal Name

1

USB_PWR

2

USB_D-

3

USB_D+

4

GND

5

SSRX-

6

SSRX+

7

GND

8

SSTX-

9

SSTX+

4

9

USB3_5

4

1

9

5

USB3_8

19 : LVDS Panel Connector (LVDS1)

Pin

Signal Name

1

LCD_VCC

3

+3.3V

5

N/A

7

LVDS_A_DATA0

9

LVDS_A_DATA1#

11

GND

13

LVDS_A_DATA2

15

LVDS_A_DATA3#

17

GND

19

LVDS_A_CLK

21

LVDS_B_DATA0#

23

GND

25

LVDS_B_DATA1

27

LVDS_B_DATA2#

29

DPLVDD_EN

31

LVDS_B_DATA3

33

LVDS_B_CLK#

35

GND

37

CON_LBKLT_CTL

39

LCD_BLT_VCC

Signal Name

Pin

LCD_VCC

2

N/A

4

LVDS_A_DATA0#

6

PD (Panel Detection) 8

LVDS_A_DATA1

10

LVDS_A_DATA2#

12

GND

14

LVDS_A_DATA3

16

LVDS_A_CLK#

18

GND

20

LVDS_B_DATA0

22

LVDS_B_DATA1#

24

GND

26

LVDS_B_DATA2

28

LVDS_B_DATA3#

30

GND

32

LVDS_B_CLK

34

CON_LBKLT_EN

36

LCD_BLT_VCC

38

LCD_BLT_VCC

40

2

1

40

39

· PD (Panel Detection): Connect this pin to LVDS Panel's Ground pin to detect Panel detection.

20 : Inverter Power Control Wafer (BLT_PWR1)

Pin

Signal Name

1

GND

1

2

GND

3

CON_LBKLT_CTL

4

CON_LBKLT_EN

5

LCD_BLT_VCC

6

6

LCD_BLT_VCC

21 : Backlight Volume Control (BLT_VOL1)

Pin

Signal Name

1

GPIO_VOL_UP

1

2

GPIO_VOL_DW

3

PWRDN

4

BLT_UP

5

BLT_DW

6

GND

7

7

GND

12

3

45 6

7

54 53

Bottom: DP1

Top: COM1

1

1

1 ATX12V1
PWR_COM1 LAN1_2_LED

Bottom: LAN2

Top: LAN1

1 ATX12V2

1 CPU_FAN1

1 CHA_FAN2
PWR_LOSS1 1

ATXPWR1

DDR5_B2 (64 bit, 288-pin module)

DDR5_B1 (64 bit, 288-pin module)

DDR5_A2 (64 bit, 288-pin module)

DDR5_A1 (64 bit, 288-pin module)

52

USB 3.2 Gen2 Bottom: Top: USB3_4 HDMI1 Middle: USB3_3

51 50 49
48
47 46 45
44
43 42 41 40 39 38 37 36

USB 3.2 Gen2 Middle: USB3_2 Bottom: USB3_1

Top: LAN3

Bottom: Thunderbolt
Type-C TC_TB_1

Middle:

Top:

USB 3.2 Gen2 LAN4

USB3_7

USB 3.2 Gen2 Middle: USB3_10 Bottom: USB3_9

Top: LAN5

Bottom: Middle: Top: Mic-in Line-out Line-in

1 TC_TB_2

CHA_FAN3 1
PCIE1

1
1 DACC1
1 1
LAN3_4_LED LAN5_LED1 PWR_BAT1

PCIE2 PCIE3

1

CLRMOS2_CLRMOS1

1

1

JTAG1

BUZZ2

BUZZ1

PCIE4

SPDIF1 1
1 HD_AUDIO1

SPEAKER1 1
1 1
JGPIO_SET1 1 JGPIO_PWR1

LPT_GPIO1

1

M2_M1

1

CHA_FAN1

IMB-1317

1 M2_E1

BATTERY1

1 M2_M2

PSU_SMB1

BLT_PWM2 PANEL1

HEATER1 USB2_13
BLT_PWM1

1
1 1

PLED

HDLED

PWRBTN

RESET

1

1

1

1

1

SATA3_0 SATA3_1

1 1

SATA3_2 SATA3_3

1 1
1 USB3_8
USB3_5 1
M2_B1 1

1

1

1

1 SATA3_6_7

BKT_PWR1 PNL_PWR1 BLT_VOL1 BLT_PWR1 LVDS1

PWR_COM6

PWR_COM3

PWR_COM2

PWR_COM5

PWR_COM4

1

1

1

1

1

COM2 1

COM6 1

COM5 1

COM3 1

COM4 1

1 ESPI1

1

1

SIO_AT1 CI2_1

1 COM3_CC_TTL_SEL1

BIOS ROM
1

SATA3_4_5

8
9 10 11 12 13 14 15
16
17 18
19 20 21
22

35 34 33

32

31

30

2928 27 26 25 24 23

23 : Backlight Power Select

(LCD_BLT_VCC) (BKT_PWR1)

1

1-2 : LCD_BLT_VCC : +5V (Default) 3 2-3 : LCD_BLT_VCC : +12V

24 : COM3_CC_TTL_SEL1

Pin Signal Name

1

+5V

3

5 TTXD_3_TTL

7

TTXD_3

9 TTXD_3_RS232

Signal Name Pin

GND

2

NA

4

RRXD_3_TTL 6

RRXD_3

8

RRXD_3_RS232 10

2

10

1

9

COM_CC_TTL_SEL1:79 COM_CC_TTL_SEL1:80

MINI_JUMPER

MINI_JUMPER

Open: CCTALK function

· Supported by CCTALK Card (optional).

5-7 + 6-8 : TTL function

2

10

1

9

7-9 + 8-10 : COM (RS232) 2 10

(Default)

1

9

25 : Panel Power Select

1

(PNL_PWR1)

1-2 : +3V (Default)

2-3 : +5V

5

4-5 : +12V

26 : Chassis Intrusion Header (CI2_1)

Open: Normal (Default)

Short: Active Case Open

1 2

27 : ATX/AT Mode Jumper (SIO_AT1)

Open : ATX Mode (Default)

Short : AT Mode

1 2

30 : ESPI Header (ESPI1)

44 : M.2 Key-E Socket (M2_E1)

Pin

Signal Name

1

GND

2

ESPI_CLK

3

NA

4

ESPI_CS#

5

ESPI_RESET#

6

GND

7

+3V

8

ESPI_CS#1

9

PLTRST#

10

COM_RST#

11

ESPI_IO0

12

ESPI_IO1

13

ESPI_IO2

14

ESPI_IO3

15

ALERT#1

16

+3VSB

17

Internal Use

18

+5VSB

19

ESPI_ALERT#

20

GND

20

1

Pin

Signal Name

1

GND

3

USB_D+

5

USB_D-

7

GND

9 CNV_WGR_D1-

11 CNV_WGR_D1+

13

GND

15 CNV_WGR_D0-

17 CNV_WGR_D0+

19

GND

21 CNV_WGR_CLK-

23 CNV_WGR_CLK+

Signal Name

Pin

+3.3V

2

+3.3V

4

NA

6

PCMCLK

8

CNV_RF_RESET 10

PCMIN

12

MODEM_CLKREQ 14

NA

16

GND

18

NA

20

CNV_BRI_RSP 22

CNV_BGI_DT

32

33

GND

CNV_RGI_RSP 34

35

PETp

CNV_BRI_DT

36

37

PETn

CL_RST#

38

39

GND

CL_DATA

40

41

PERp

CL_CLK

42

43

PERn

CNV_PA_BLANKING 44

45

GND

CNV_MFUART2_TXD 46

47

PEFCLKp

CNV_MFUART2_RXD 48

49

PEFCLKn

SUSCLK

50

51

GND

PERST0#

52

53

CLKREQ#

BT_OFF#

54

55

NA

WIFI_OFF#

56

57

GND

SMB_DATA

58

59

CNV_WT_D1-

SMB_CLK

60

61 CNV_WT_D1+

NA

62

63

GND

NA

64

65

CNV_WT_D0-

NA

66

67 CNV_WT_D0+

NA

68

69

GND

NA

70

71 CNV_WT_CLK-

+3.3V

72

73 CNV_WT_CLK+

+3.3V

74

75

GND

31 : COM Port Headers COM2 (RS232/422/485) COM3~COM6 (RS232)

Pin Signal Name

1

DDCD#

3

TTXD

5

GND

7

RRTS#

9

PWR

Signal Name Pin

RRXD

2

DDTR#

4

DDSR#

6

CCTS#

8

10

10

2

9

1

* This motherboard supports RS232/422/485 on COM1, 2 ports. Please refer to the table below for the pin definition. In addition, COM1, 2 ports (RS232/422/485) can be adjusted in BIOS setup utility > Advanced Screen > Super IO Configuration. You may refer to our user manual for details.

COM1, 2 Ports Pin Definition

Pin RS232

1

DCD

2

RXD

3

TXD

4

DTR

5

GND

6

DSR

7

RTS

8

CTS

9

PWR

RS422 TXTX+ RX+ RXGND NA NA NA PWR

RS485 RTXRTX+ NA NA GND NA NA NA PWR

32 : Printer Port/GPIO Header (LPT_GPIO1)

Printer Port:

GPIO:

Pin Signal Name

1

STB#

3

SPD0

5

SPD1

7

SPD2

9

SPD3

11

SPD4

13

SPD5

15

SPD6

17

SPD7

19

ACK#

21

BUSY

23

PE

25

SLCT

2

Signal Name Pin Pin Signal Name

Signal Name Pin

AFD#

21

SIO_GP77

SIO_GP76

2

ERROR#

43

SIO_GP80

SIO_GP75

4

PINIT#

65

SIO_GP81

SIO_GP74

6

SLIN#

87

SIO_GP82

SIO_GP73

8

GND

10 9

SIO_GP83

JGPIOPWR 10

GND

12 11

SIO_GP84

JGPIOPWR 12

GND

14 13 SIO_GP85

GND

14

GND

16 15 SIO_GP86

GND

16

GND GND

18 20

17

SIO_GP87/ GPP_SD01

GND

18

GND GND

22 24

19

SIO_G72/ GPP_SD00

GND

20

26 21 SIO_G71/GPP_I02

GND

22

26

23 SIO_G70/GPP_I03

GND

24

25

NA

NC

26

1

25

· To use the printer port function, please short pin4 and pin5 on Digital Input/Output Power Select (JGPIO_PWR1).

Parameter

Range

GPIO input Low voltage

Max: 0.8 V

GPIO input High voltage

Min: 2.4 V

GPIO output Low voltage

Max: 0.4 V

GPIO output High voltage

Min: 2.5 V

Note:

LPT_GPIO1 Pin 10, Pin12 - JGPIOPWR,

Current Max. 1A

33 : Digital Input/Output Default Value

Setting (JGPIO_SET1)

1-2 : Pull-High (Default)

1

3

2-3 : Pull-Low

34 : Digital Input/Output Power Select

(JGPIOPWR) (JGPIO_PWR1)

1-2 : +12V

2-3 : +5V (Default)

1

5

3-4 : +5V

4-5 : GND

35 : Front Panel Audio Header (HD_AUDIO1)

Pin Signal Name

1

MIC2_L

3

MIC2_R

5

OUT2_R

7

J_SENSE

9

OUT2_L

Signal Name Pin

GND

2

4

MIC_RET

6

8

OUT_RET 10

2

10

1

9

36 : SPDIF Header (SPDIF1)

Pin

Signal Name

1

+5V

2

3

SPDIF OUT

4

GND

1

4

37 : 3W Audio Output Wafer (SPEAKER1)

Pin

Signal Name

1

OUTLN

2

OUTLP

3

OUTRP

4

OUTRN

4

1

38 : Buzzer Header (BUZZ2)

Pin

Signal Name

1

+5V

2

BUZZ_LOW

1 2

39 : JTAG1
Pin 1 2 3 4 5

Signal Name GND TDO TDI TCLK TMS

1

5

40 : Clear CMOS Header

(CLRMOS1_CLRMOS2)

Pin

Signal Name

1-2

Open : Normal (Default) Short : Auto Clear CMOS (Power Off)

1

5

3-4

Normal (Default)

4-5

Clear CMOS

41 : DACC1

1

Open: no ACC

2

Short: ACC (Default)

· Auto clear CMOS when system boot improperly.

42 : PWR_BAT1 Open : Normal (Default) 1 2 Short : Charge Battery
· Only supported by chargeable battery.

46 : Thunderbolt Type-C Port (TC_TB_2) 47 : Audio Jacks
Top : Blue: Line-in Middle : Green: Line-out Bottom : Pink: Mic-in 48 : Top : RJ45 LAN Port (LAN5)
* For IMB-X1317-10G only.
Middle : USB 3.2 Gen2 Port (USB3_10) Bottom : USB 3.2 Gen2 Port (USB3_9) 49 : Top : RJ45 LAN Port (LAN4) Middle : USB 3.2 Gen2 Port (USB3_7) Bottom : Thunderbolt Type-C Port
(TC_TB_1) 50 : Socket LGA1851 RL-ILM
*35LB thermal solution load required.
51 : Top : RJ45 LAN Port (LAN3) Middle : USB 3.2 Gen2 Port (USB3_2) Bottom : USB 3.2 Gen2 Port (USB3_1)
52 : Top : USB 3.2 Gen2 Port (USB3_4) Middle : USB 3.2 Gen2 Port (USB3_3) Bottom : HDMI Port (HDMI1)
53 : RJ45 LAN Ports
* For IMB-X1317 & IMB-X1317-10G only.
Top : LAN1 Bottom : LAN2 54 : Top : COM Port (COM1) (RS232/422/485)* Bottom : DisplayPort (DP1)
Installation of LOTES ROM Socket

Press simultaneously

105°

PRESS

Pin 1
PRESS

OPEN

LOCK

TAKE OUT PUT IN

· Do not press one side of the actuator cover at a time. Always apply even and simultaneous force to both sides to avoid damage.
· Do not apply force to the actuator cover after the IC is inserted, especially when it is fully opened at 105 degrees. Pressing vertically at this angle may cause the cover to break.

Pin 1

· The white dot (Pin 1) on the ROM must align with the Pin 1 position of the socket (white arrow area).
· Ensure the white dot on the ROM is facing outward from the socket. Warning: Incorrect installation may damage the chipset and motherboard. Refer to the picture for proper orientation.


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