Re: BIOS V 4.51 PG

Re: BIOS V 4.51 PG

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Posted by Henry on December 21, 2001 at 11:17:16:

In Reply to: BIOS V 4.51 PG posted by Francesco on December 21, 2001 at 06:10:15:

: I need updates for my BIOS because of memory problems:my socket 7 don't recognize dimm pc100 : It is an award modular BIOS V 4.51 PG
: : 08/07/97-580VPX-UMC8669-2A5LDV39C-00
: : BIOS-U (70807A)
: : Superio:UMC/ITE 8669 rev 0 found at port 108h
: : Chipset : VIA 82C585 rev 35
: 2A5LD VIA VPX CHIPSET sometimes relabeled as VXPro+ (Vtech chipset)

: : I don't want to pay for the update;I really need the updates.
: I have only found these bios updates but I don't understand how to choose between them.Tell me if one of these is good or where I can found the good one. I'm looking for a free solution.Thank you

: Intel Pentium Motherboards:
: MB-6882
: Bios Upgrade for 6882

: MB-6811
: Bios Upgrade for 6811

: MB-5981
: Bios Upgrade for 5981

: MB-5987
: Bios Upgrade for 5987

: MB-6861
: 6610s151.EXE
: (most current) MB 6861 BIOS -Necessary for Pentium III to 500 MHz operation

: MB-6831
: 637WIQ05.EXE
: Current BIOS upgrade for the MB 6831

: MB-6831a
: Current BIOS upgrade for the MB 6831a

: MB-6823
: 623WIQ05.EXE
: Award BIOS V4.51PG

: MB-5689 & 5689A
: Award BIOS for MB-5689A (2-1-99)
: Award BIOS V4.51PG

: MB-5685
: 565WIQ0b.EXE
: Award BIOS V4.51PG

: MB 5575 & MB 557
: 557WSQ0F.EXE
: Award BIOS V4.51PG (ver 1.5 & 1.32 with SMC Chipset)
: Award BIOS V4.51PG (ver 1.5 & 132 with UMC Chipset)

: MB-553
: Award BIOS 4.51PG

: Thank you

SMART that you asked. Your PC100 memory issue IS NOT A BIOS PROBLEM, it is a chipset limitation. PC133 and PC100 are backward compatible with PC66 as long as you do not try to operate outside chipset limitations. Your chipset limits maximum onboard MBytes, maximum MBytes per DIMM and maximum Mbits per chip on the stick. Your chipset most likely limits you to 64 MBytes per DIMM, maybe less (check your mainboard manual and VIA's chipset spec sheet - really a spec BOOK). Your mainboard is most likely to recognize DIMMs with chips on both sides (lower bit density). DIMMs are HARD to install - especially new ones and WILL NOT be recognized unless installed correctly - install and remove them until you hear and feel one sharp click when the DIMM seats (usually takes about 6 tries per DIMM to get it right).

IF you NEED to update your BIOS, you MUST choose the BIOS update that EXACTLY matches your mainboard - otherwise you will corrupt your BIOS (therefore SAVE your old BIOS before you even think about flashing the BIOS update - so you can RECOVER if necessary). You must know your mainboard maker (apparently VTech/PC Partner), your mainboard model (that's the MB-xxxx number), and sometimes the mainboard version (usually printed or etched on the board). You need to figure out WHAT your mainboard model is (probably NOT on the mainboard, but look anyway - like between the slots and along the edges of the board. If you need to figure out your model number, just follow the motherboard ID article at:

DO NOT "update" your BIOS unless you have a definite NEED, such as enhance an existing feature or add a feature that you do not have now. If you "update" anyway, you have NOTHING to gain and your BIOS to corrupt.

Good Luck,

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