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Introduction

P2-133A

Page 1-8

Figure 5:  System Block Diagram

System Block Diagram

P e n tiu m     II  o r 
D e s c h u te s  
P ro c e s s o r

PC I Bridg e  

a nd   m e m ory 

c ontrolle r  

VT8 2 C 6 9 3

VT8 2 C 5 9 6 A

I/O  Brid g e

1 0 0 /6 6 M H z

1 0 0 /6 6 M H z

6 6 M H z

Win bo nd

8 3 9 7 7 TF

Содержание P2-133A

Страница 1: ...98 P2 133A P2 133A P2 133A P2 133A P2 133A A Pentium A Pentium A Pentium A Pentium A Pentium II or Deschutes II or Deschutes II or Deschutes II or Deschutes II or Deschutes Slot1 Processor based AGP Slot1 Processor based AGP Slot1 Processor based AGP Slot1 Processor based AGP Slot1 Processor based AGP mainboard 100 66MHz mainboard 100 66MHz mainboard 100 66MHz mainboard 100 66MHz mainboard 100 66M...

Страница 2: ...P2 133A ...

Страница 3: ...l number __________________________ BIOS Upgrades Please use either our Web Site or BBS for current BIOS Upgrades Internet Access http www epox com http www epox com tw sales epox com tech epox com Modem Access 31 182 618451 The Netherlands You can access this number via a Hayes compatible modem with a 2 400 to 28 800 baud rate The following setup format is required 8 Data Bits No Parity 1 Stop Bi...

Страница 4: ...n the manual or product EPoX may review this manual from time to time without notice For updated BIOS drivers or product release information you may visit EPoX s home page at http www epox com Products mentioned in this manual are mentioned for identification purposes only Product names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies The...

Страница 5: ...n Off Remote 1 7 SystemBlockDiagram 1 8 Section 2 Features P2 133A Features 2 1 Section 3 Installation P2 133A Detailed Layout 3 2 Easy Installation Procedure ConfigureJumpers 3 3 SystemMemoryConfiguration 3 5 InstallingaPentium IIProcessor 3 9 DeviceConnectors 3 10 External Modem Ring in Power ON and Keyboard Power ON Function KBPO 3 12 Section 4 Award BIOS Setup BIOSInstructions 4 1 Standard CMO...

Страница 6: ...rd 4 19 IDEHDDAutoDetection 4 20 HDD Low Level Format 4 22 Save Exit Setup 4 22 ExitWithoutSaving 4 22 Appendix A Memory Map A 1 I O Map A 1 Timer DMAChannelsMap A 2 InterruptMap A 2 RTC CMOS RAM Map A 3 Appendix B POST Codes A 5 UnexpectedErrors A 8 Appendix C LoadSetupDefaults A 9 Appendix D CPU Clock Frequency Selection In BIOS Setting A 10 ...

Страница 7: ...133A user s manual ü ü ü ü ü C 1 Floppy ribbon cable ü ü ü ü ü D 1 Hard drive ribbon cables ü ü ü ü ü E 1 Foldable Retention Module F 1 Heatsink Support Unit Optional G 1 PS 2 to AT keyboard connector adapter optional ü ü ü ü ü H 1 Bus master drivers 1 USDM USERS MANUAL P2 133A B A G C D E H or F Top Half Bottom Half 25 26 ...

Страница 8: ...s Processor card supports both uni processor and dual processor implementations The Pentium II or Deschutes Processor utilizes Single Edge Contact S E C Figure 1 cartridge packaging technology The S E C cartridge allows the L2 cache to remain tightly coupled to the processor while maintaining flexibility when imple menting high performance processors into OEM systems The second level cache is perf...

Страница 9: ...e PLGA package on the PCB Cover The plastic cover on the opposite side from the thermal plate Slot 1 The slot that the S E C cartridge plugs into just as the Pentium Pro processor uses Socket 8 Retention mechanism Formerly retention module the dual posts etc that holds the cartridge in place Thermal plate The heatsink attachment plate Heat sink supports Figure 1 Pentium II or Deschutes Processor C...

Страница 10: ...r become more and more popular these demands will only increase This will cause a rise in costs for both end users and manufacturers Lowering these costs as well as improving performance is the primary motivation behind AGP By providing a massive increase in the bandwidth available between the video card and the processor it will assist in relieving some of these pressures for quite sometime Hardw...

Страница 11: ...Introduction P2 133A Page 1 5 Page Right Blank ...

Страница 12: ...ms integrators differentiate their products in the marketplace and better meet your needs By integrating more I O down onto the board and better positioning the hard drive and floppy connectors material cost of cables and add in cards is reduced By reducing the number of cables and components in the system manufacturing time and inventory holding costs are reduced and reliability will increase By ...

Страница 13: ...y button that is normally open The P2 133A has been designed with Soft Off functions You can turn Off the system from one of two sources The first is the front panel Power On Off button and the other is the Soft Off function coming from the EP 133A s onboard circuit controller that can be controlled by the operating system Windows 95 98 will control this when the user clicks that they are ready to...

Страница 14: ...on P2 133A Page 1 8 Figure 5 System Block Diagram System Block Diagram Pentium II or Deschutes Processor PCI Bridge and m em ory controller VT82C693 VT82C596A I O Bridge 100 66MHz 100 66MHz 66MHz Winbond 83977TF ...

Страница 15: ...le bit errors and correct 1 bit memory errors Supports 2 16 bit ISA slots 5 32 bit PCI slots 1 AGP slot and provides 2 independent high performance PCI IDE interfaces capable of supporting PIO Mode 3 4 and Ultra DMA 33 devices The P2 133A supports 5 PCI Bus Master slots and a jumperless PCI INT control scheme which reduces configuration confusion when plugging in PCI card s Supports ATAPI e g CD R...

Страница 16: ... In the event of a power outtage your system will automatically turn itself back on without user intervention Supports CPU Hardware sleep and SMM System Management Mode Supports Desktop Management Interface DMI facilitating the management of desktop computers hardware and software components and peripherals whether they are stand alone systems or linked into networks optional Supports Hot key Any ...

Страница 17: ...Installation P2 133A Page 3 1 Section 3 INSTALLATION ...

Страница 18: ...rd Bottom IDE2 Secondary IDE IDE1 FDD1 CPU Cartridge SLOT 1 J7 WOL DIMM 2 DIMM 1 Bank 0 Bank 1 DIMM 3 Bank 2 Flash Memory for BIOS J5 PCI Slot 3 PCI Slot 4 PCI Slot 5 COM 1 COM 2 COM 2 USB PS 2 ESDJ JP3 124MHz 112MHz 103MHz 100MHz 66MHz AUTO 5 5X 5X 4 5X 4X 3 5X 3X 1 2 25 26 133MHz Parallel Port J8 SB_Link J6 CHASSIS FAN POWER FAN JP13 JP1 1 POWER_ON 1 J3 IR CONN J2 RESET SPK KEYLOCK 5 1 CPU FAN J...

Страница 19: ...f the ESDJ that you are required to set before moving on to step 3 2 Note The ESDJ as depicted as shown Figure 1 in their correct physical orientation JP 13 K eyboard Pow er O N function refer the section 3 5 JP 13 1 2 E nabled 2 3 D isabled D efault 1 3 J7 W O L W akup O n Lan C onnector R eserved for N IC N etw ork Interface C ard to W ake the System JP 1 1 2 R un M ode D efault 2 3 C lear C M O...

Страница 20: ...r to be mounted onto this mainboard However no matter what kind of Slot1 processoryouinstalled itshouldcomewithrightmemorymodulesfornormaland stable operation For example if you install a Deschutes processor you should use the SDRAM module with 100MHz based or above to match the CPU speed Furthermore one thing you may need to bear in mind before the CPU installation it is anyway our advice to use ...

Страница 21: ... 66MHz not support Deschutes Processor at 100MHz We recommend when installed the 100MHz Deschutes Processor using DIMM SDRAM must be 125MHz 8ns bus speed If used 100MHz 10ns SDRAM may be critical timing for the motherboard About the PC 100 SDRAM spec information you may visit Intel s home page at http developer intel com design pcisets memory index htm DIMM SDRAM may be 83MHz 12ns 100MHz 10ns or 1...

Страница 22: ...sing straight down figure 6 until it fits tightly into the DIMM socket figure 7 Figure 3 y r o m e M l a t o T 1 M M I D 0 k n a B 2 M M I D 1 k n a B 3 M M I D 2 k n a B B M 4 8 3 m u m i x a M M A R D S O D E B M 2 3 B M 6 1 B M 8 1 X B M 8 2 1 B M 4 6 M A R D S O D E B M 2 3 B M 6 1 B M 8 1 X B M 8 2 1 B M 4 6 M A R D S O D E B M 2 3 B M 6 1 B M 8 1 X B M 8 2 1 B M 4 6 B M 6 5 2 m u m i x a M M...

Страница 23: ... 3 7 Figure 6 DIMM Module clip before installation Figure 7 DIMM Module clip after installation To remove the DIMM module simply press down both of the white clips on either side and the module will be released from the socket ...

Страница 24: ...um II Retention Mechanism This pre installed device is designed for you to install Pentium II CPU more easier and to avoide any damage on the board due to overtightening the four screws One thing must be kept in your mind that please make sure to lift upright the foldable parts of the Retention module to fit and install CPU properly Figure 8 Now we are going to install the heatsink support base pi...

Страница 25: ... it into the bottom fin figure 11 on the heatsink and then push forward until it clips into the bottom base figure 9 that is already there figure 11 CPU Cartridge SLOT 1 Large Hole for Heat Sink Base Small Hole for Heat Sink Base Figure 10 Motherboard Layout Figure 9 shows the layout of Slot 1 and the holes for mounting the Heatsink base piece figure 8 Figure 9 Figure 11 Top half of the support Bo...

Страница 26: ...Power supply so that BIOS can monitor the RPM s J6 Chassis Fan Power A plug in for the chassis Fan Power J7 WOL Wake On Lan Connector J8 SB LINK Connector 5 PIN Header for Creative Blaster AWE64D PCI Sound Card PW2 ATX Power Connector 20 pin power connector J2 J3 Chassis Panel Connector Keylock Speaker Reset Sleep Turbo LED and HDD LED IDE1 Primary IDE Connector IDE2 Secondary IDE Connector FDD1 F...

Страница 27: ...tem go into suspend mode when the button is pressed momentarily J2 Section 3 4 Device Connectors continued Speaker Connect to the system s speaker for beeping 1 Speaker 3 GND 2 N C 4 GND Reset Closed to restart system Turbo LED indicator LED ON when higher speed is selected IDE LED indicator LED ON when Onboard PCI IDE Hard disks is activate KeyLock Keyboard lock switch Power LED connector 1 Power...

Страница 28: ...p 1 Please check JP13 at the position 1 2 after you finished the system installation Step 2 Push the momentary switch J3 PW ON to turn on your system and then push again to hold for more than 4 seconds to turn it off affter counted memory as soon as you turn it on Step 3 You can enjoy the Keyboard Power ON function KBPO by pressing any 1 key Hot key Ctrl F1 F2 F12 Password A maximum of 5 character...

Страница 29: ...he power supply with 0 72A 720mA in 5 0VSB With our P2 133A mainboard the 5 0VSB standby power only has to be 0 1A 100mA then you can enjoy this unique benefit However the ATX power supply which is 0 1 100mA is still applicable to your system by placed JP13 at the position 2 3 to disable this feature ...

Страница 30: ...Installation P2 133A Page 3 14 Page Left Blank ...

Страница 31: ... fail this will cause data loss in the CMOS only If this does happen you will need to reconfigure your BIOS settings To enter the Setup Program Power on the computer and press the Del key immediately this will bring you into the BIOS CMOS SETUP UTILITY Figure 1 CMOS Setup Utility STANDARD CMOS SETUP SUPERVISOR PASSWORD BIOS FEATURES SETUP USER PASSWORD CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION...

Страница 32: ...by the BIOS and displayed for your reference When a field is highlighted use direction keys to move the cursor and the Enter key to select the entries in the field can be changed by pressing the PgDn or the PgUp key Figure 2 Standard CMOS Setup NOTE If the hard disk Primary Master Slave and Secondary Master Slave are set to Auto then the hard disk size and model will be auto detected ROM PCI ISA B...

Страница 33: ...nti virus program to locate the virus Keep in mind that this feature protects only the boot sector not the entire hard drive The default value is Disabled ROM PCI ISA BIOS 2A6LFPAB BIOS FEATURES SETUP AWARD SOFTWARE INC Virus Warning Disabled Video BIOS Shadow Enabled CPU Internal Cache Enabled C8000 CBFFF Shadow Disabled External Cache Enabled CC000 CFFFF Shadow Disabled CPU L2 Cache ECC Checking...

Страница 34: ...bled This deactivates the processor s internal cache thereby lowering performance CPU L2 Cache ECC Checking This controls the CPU s L2 cache to supports Error Checking and Correcting ECC The default is Disabled Enabled Enabled the CPU s L2 cache to Support ECC function When enabled this item the performance should be impact 2 4 Disabled Disabled the CPU s L2 cache to support ECC function External ...

Страница 35: ...k drive installed is 40 or 80 tracks Only 360K type is 40 tracks while 760K 1 2MB and 1 44MB are all 80 tracks The default is Enabled Enabled The BIOS will search the floppy disk drive to determine if it is 40 or 80 tracks Disabled The BIOS will not search for the type of floppy disk drive by track number NOTE BIOS can not tell the difference between 720K 1 2MB and 1 44MB drive types as they are a...

Страница 36: ...econd Typematic Delay msec This setting controls the time between the first and the second character displayed by typematic auto repeat The default is 250 250 250 msec 500 500 msec 750 750 msec 1000 1000 msec Security Option This category allows you to limit access to the System and Setup or just to Setup The default is Setup System The system will not boot and the access to Setup will be denied i...

Страница 37: ...ther WIN95 is with FDD or not The Default value is Yes NO Report No FDD for WIN95 YES Report FDD for WIN95 Video BIOS Shadow This option allows video BIOS to be copied into RAM Video Shadowing will increase the video performance of your system The default is Enabled Enabled Video shadow is enabled Disabled Video shadow is disabled C8000 CBFFF Shadow CC000 CFFFF Shadow D0000 D3FFF Shadow D4000 D7FF...

Страница 38: ...E INC Bank 0 1 DRAM Timing Fast System CPU Warning Temp 50 C 122 Bank 2 3 DRAM Timing Fast Current CPU Temp 39 C 102 Bank 4 5 DRAM Timing Fast Current System Temp 29 C 84 Current CPU Fan Speed 4272 RPM SDRAM Cycle length Auto Current CPU Fan Speed 0 RPM Memory Hole At 15Mb Addr Disabled Current Chasiss Fan Speed 0 RPM Read Around write Disabled CPUcore 2 76 V CPUI O 1 47 V Concurrent PCI Host Enab...

Страница 39: ...ystems memory accessable by the AGP card 256 256MB of systems memory accessable by the AGP card Auto Detect DIMM PCI Clk Allows you to stop DIMM PCI Clock drive when the DIMM site or PCI Slot are not plug This item may help reduce EMI The default is Enabled Enabled Provides unused DIMM PCI to stop Disabled Provides the clock generator always driving Spread Spectrum Modulated Allows you to active t...

Страница 40: ...gement function is disabled Max saving Maximum power savings Inactivity period is 1 minute in each ROM PCI ISA BIOS 2A6LFPAB POWER MANAGEMENT SETUP AWARD SOFTWARE INC Power Management User Define Primary INTR ON PM Control by APM Yes IRQ3 COM 2 Primary Video off Option Suspend Off IRQ4 COM 1 Primary Video off Method V H SYNC Blank IRQ5 LPT 2 Primary MODEM Use IRQ 3 IRQ6 Floppy Disk Disabled Soft o...

Страница 41: ...orts the Display Power Management Signaling DPMS standard of the Video Electronics Stan dards Association VESA Use the software supplied for your video sub system to select video power management values Blank Screen System only writes blanks to the video buffer Video Off option Tells you what time frame that the video will be disabled under current power management settings The default is Standby ...

Страница 42: ...ent Disabled Your monitor s power features will not be included in power management Soft Off by PWR BTTN Use this to select your soft off function The default is Delay 4 sec Instant Off Turns off instantly Delay 4 Second Turns off after a 4 second delay If momentary press of button the system will go into Suspend Mode Press again to take system out of Suspend Mode Resume by Alarm This option allow...

Страница 43: ...RD SOFTWARE INC PNP OS Installed No CPU to PCI Write Buffer Enabled Resources Controlled By Manual PCI Dynamic Bursting Enabled Reset Configuration Data Disabled PCI Master 0 WS Write Enabled PCI Delay Transaction Enabled IRQ 3 assigned to Legacy ISA PCI Master Read Prefetch Enabled IRQ 4 assigned to Legacy ISA PCI 2 Access 1 Retry Disabled IRQ 5 assigned to PCI ISA PnP AGP Master 1 WS Write Enabl...

Страница 44: ...he BIOS assumes that the hard drive controller is an ISA device rather than a PCI controller If you are using a PCI controller then you will need to change this to specify which PCI slot has the control ler and which PCI interrupt A B C or D is associated with the connected IDE devices Assign IRQ For USB This item allows BIOS to assign whether IRQ is with USB or not If you have not connect the USB...

Страница 45: ... port ROM PCI ISA BIOS 2A6LFPAB INTEGRATED PERIPHERALS AWARD SOFTWARE INC OnChip IDE Channel0 Enabled Onboard Parallel Port 378 IRQ7 OnChip IDE Channel1 Enabled Onboard Parallel Mode ECP EPP IDE Prefetch Mode Enabled ECP Mode Use DMA 3 IDE HDD Block Mode Enabled Parallel Port EPP Type EPP1 9 Primary Master PIO Auto OnChip USB Enabled Primary Slave PIO Auto USB Keyboard Support Disabled Secondary M...

Страница 46: ...rammed interrupt mode Secondary Master PIO The default is Auto Auto BIOS will automatically detect the Onboard Secondary Master PCI IDE HDD Accessing mode Mode 0 4 Manually set the IDE Programmed interrupt mode Secondary Slave PIO The default is Auto Auto BIOS will automatically detect the Onboard Secondary Slave PCI IDE HDD Accessing mode Mode 0 4 Manually set the IDE Programmed interrupt mode Pr...

Страница 47: ...ional USB keyboard that may be attached The default is disabled Enabled Enable USB keyboard support Disabled Disable USB keyboard support Onboard FDD Controller This controls the state of the onboard floppy controller The default value is Enabled Enabled Enable the Onboard Winbond Chips s floppy drive interface controller Disabled Disable the Onboard Winbond Chip s floppy drive interface controlle...

Страница 48: ... formats Normal The IRRX and IRTX pins of IR function in normal condition Onboard Parallel port This field allows the user to configure the LPT port The default is 378H IRQ7 378H Enable Onboard LPT port and address is 378H and IRQ7 278H Enable Onboard LPT port and address is 278H and IRQ5 3BCH Enable Onboard LPT port and address is 3BCH and IRQ7 Disabled Disable Onboard Winbond Chip s LPT port Par...

Страница 49: ...ters The maximum of password is 5 characters If user forget lost the password please go into BIOS setting to change the Power On Method or keyin another words as password instead of original one 4 8 Change Supervisor or User Password To change the password choose the SUPERVISOR PASSWORD or USER PASSWORD option from the CMOS SETUP UTILITY menu and press Enter NOTE Either Setup or System must be sel...

Страница 50: ...O DETECTION utility The BIOS will Auto detect the hard disk size and model on display during POST Figure 8 IDE HDD Auto Detection NOTE HDD Modes The Award BIOS supports 3 HDD modes NORMAL LBA LARGE NORMAL mode Generic access mode in which neither the BIOS nor the IDE controller will make any transformations during accessing The maximum number of cylinders head sectors for NORMAL mode are ROM PCI I...

Страница 51: ...ector head cylinder into its own physical address inside the HDD The maximum HDD size supported by LBA mode is 8 4 GigaBytes which is obtained by the followingformula no Cylinder 1024 x no Head 255 x no Sector 63 x bytes per sector 512 8 4 GigaBytes LARGE mode Extended HDD access mode supported by Award Software Some IDE HDDs contain more than 1024 cylinder without LBA support in some cases user d...

Страница 52: ...drives larger than 528MB 4 10 HDD Low Level Format Interleave Select the interleave number of the hard disk drive you wish to perform a low level format on You may select from 1 to 8 Check the documentation that came with the drive for the correct interleave number or select 0 for automatic detection Auto scan bad track This allows the utility to scan first then format by each track Start Press Y ...

Страница 53: ...CFFF 20K BIOS runtime service routine 2 FD000 FDFFF 4K Plug and Play ESCD data area FE000 FFFFF 8K BIOS runtime service routine 1 A 2 I O MAP 000 01F DMA controller Master 020 021 INTERRUPT CONTROLLER Master 022 023 CHIPSET control registers I O ports 040 05F TIMER control registers 060 06F KEYBOARDinterfacecontroller 8042 070 07F RTC ports CMOS I O ports 080 09F DMA register 0A0 0BF INTERRUPTcont...

Страница 54: ...d ECP Option DMA Channel 2 FLOPPYDISK SMCCHIP DMA Channel 3 Onboard ECP default DMA Channel 4 Cascade for DMA controller 1 DMA Channel 5 Available DMA Channel 6 Available DMA Channel 7 Available A 4 INTERRUPT MAP NMI Parity check error IRQ H W 0 System TIMER interrupt from TIMER 0 1 KEYBOARD output buffer full 2 Cascade for IRQ 8 15 3 SERIAL port 2 4 SERIAL port 1 5 PARALLELport2 6 FLOPPYDISK SMCC...

Страница 55: ...ster B 0C Status register C 0D Status register D 0E Diagnostic status byte 0F Shutdown byte 10 FLOPPY DISK drive type byte 11 Reserve 12 HARD DISK type byte 13 Reserve 14 Equipment type 15 Base memory low byte 16 Base memory high byte 17 Extension memory low byte 18 Extension memory high byte 19 2d 2E 2F 30 Reserved for extension memory low byte 31 Reserved for extension memory high byte 32 DATECE...

Страница 56: ...Appendix P2 133A A 4 Page Left Blank ...

Страница 57: ... R W functionality C1 Auto detection of onboard DRAM Cache C5 Copy the BIOS from ROM into E0000 FFFFF shadow RAM so that POST will go faster 08 Test the first 256K DRAM 09 OEM specific cache initialization if needed 0A 1 Initialize the first 32 interrupt vectors with corresponding Interrupt handlers Initialize INT numbers from 33 120 with Dummy Spurious Interrupt Handler 2 Issue CPUID instruction ...

Страница 58: ... only 0F DMA channel 0 test 10 DMA channel 1 test 11 DMA page registers test 12 13 Reserved 14 Test 8254 Timer 0 Counter 2 15 Test 8259 interrupt mask bits for channel 1 16 Test 8259 interrupt mask bits for channel 2 17 Reserved 19 Test 8259 functionality 1A 1D Reserved 1E If EISA NVM checksum is good execute EISA initialization EISA BIOS only 1F 29 Reserved 30 Detect Base Memory Extended Memory S...

Страница 59: ...r to press F1 key 4F 1 If password is needed ask for password 2 Clear the Energy Star Logo Green BIOS only 50 Write all CMOS values currently in the BIOS stack area back into the CMOS 51 Reserved 52 1 Initialize all ISA ROMs 2 Later PCI initializations PCI BIOS only assign IRQ to PCI devices initializeallPCIROMs 3 PnP Initialzations PnP BIOS only assign IO Memory IRQ DMA to PnP ISA devices initial...

Страница 60: ...ration table 62 1 Setup daylight saving according to Setup value 2 Program the NUM Lock typematic rate typematic speed according to Setup setting 63 1 If there is any changes in the hardware configuration update the ESCD information PnP BIOS only 2 Clear memory that have been used 3 Boot system via INT 19H FF System Booting This means that the BIOS already pass the control right to the operating s...

Страница 61: ...orrupted LOAD SETUP DEFAULTS ROMPCI ISABIOS 2A6LFPAB CMOSSETUPUTILITY AWARDSOFTWARE INC Load SETUP Default Y N Y STANDARD CMOS SETUP SUPERVISOR PASSWORD BIOS FEATURES SETUP USER PASSWORD CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION POWER MANAGEMENT SETUP HDD LOW LEVEL FORMAT PNP PCI CONFIGURA ETUP INTEGRATED PERIPH SAVING LOAD SETUP DEFAULTS ESC QUIT SELECT ITEM F10 Save Exit Setup Shift F2 Chang...

Страница 62: ...to complete BIOS setting If screen becomes blank or system can t boot anymore after above setting that means your CPU couldn t be capable of supporting overclock and you have to follow the steps below to recover the CPU clock frequency Step 1 Power the system off J3 PW ON Step 2 Press INS Insert key while powering on the system system will function with 66MHz external frequency at this moment whic...

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