The Definitive
BIOS Optimization Guide

Revision 7.0
Interim Release 2

by Adrian Wong

 

 






Preface


Disclaimer
 
Although all efforts have been made to make sure all the information in this guide (and others as well) are 100% accurate,
it could still be inaccurate for any number of reasons. Some manufacturers may implement certain BIOS options differently from others. I may have misinterpreted the descriptions given by the manufacturers. As you know, most manufacturers provide rather cryptic descriptions that could really mean anything!

Therefore, if you spot any mistakes in this guide, please don't hesitate in e-mailing me or posting your observations in the forums. I appreciate any help you can give in making this guide the ultimate resource for BIOS optimization! :)

  

Plagiarism
 
Plagiarism has been a major problem for us. The BIOS Optimization Guide has been ripped off so many times that I have really lost count of the number of plagiarized guides out there. Many plagiarizers are so daring (or lazy) that they just copy the entire guide - lock, stock and barrel. Or translate it into their native language. Other plagiarizers are smarter. They modify the guide a little or just trim it down so that it has the appearance of an entirely different guide. But they all have one thing in common - they pass this guide off as their own work.
:(

Remember - although I have spent countless hours and sleepless nights working on this guide, all the information in this guide and the rest of the site has been, still is and will always be provided to everyone absolutely free of any cost or obligation! Plagiarism isn't about money or freedom of information. Plagiarism is about theft of credit. It's a major problem for writers all over the world because they deny the author the right to be recognized for his/her work.

So, if you happen to see an article similar to one posted here, please help prevent plagiarism by e-mailing those involved (me and the other "author"). Any help in eradicating plagiarism will be greatly appreciated.

  

Translations
 
Although many people understand English, they may still prefer to read in their native language. And there are many who don't understand English well enough. I have received many e-mails about this and I understand the need for the guide to be available in other languages. However, I'm sorry to say that I can't write in any language other than English and Malay.

To solve the problem, I have actually given several foreign sites permission to translate the guide. Unfortunately, there's little synchronicity between these translated guides and the original BIOS Optimization Guide. And some of these sites (but NOT all!) have even stopped corresponding after posting their translated guide. As such, it's very hard for me to ensure that all these sites maintain a certain level of quality in their translation.

Therefore, I am now looking for people to help me translate the BIOS Optimization Guide into other languages. This will allow greater access to BIOS Optimization Guide. If you think you can help me translate this guide into your native language, please let me know! Thanks! :)

  
  

BIOS Options
(No. of BIOS options in brackets)
#
(3)
A
(17)
 
16-bit I/O Recovery Time
32-bit Disk Access
8-bit I/O Recovery Time
 

 

 
Act Bank A To B CMD Delay
AGP 2X Mode
AGP 4X Drive Strength
AGP 4X Mode
AGP Aperture Size
AGP Clock/CPU FSB Clock
AGPCLK/CPUCLK
AGP Drive Strength P or N Ctrl
AGP Driving Control
AGP Driving Value
AGP Master 1WS Read
AGP Master 1WS Write
Anti-Virus Protection
APIC Function
Assign IRQ For USB
Assign IRQ For VGA
Auto Detect DIMM/PCI Clk
 

 

B
(6)
C
(5)

Boot Other Device
Boot Sequence
Boot Sequence EXT Means
Boot Up Floppy Seek
Boot Up NumLock Status
Byte Merge
 

 


CPU Drive Strength
CPU L2 Cache ECC Checking
CPU Level 1 Cache
CPU Level 2 Cache
CPU to PCI Write Buffer
 

 

D
(9)
E
(2)

Delay DRAM Read Latch
Delay IDE Initial (Sec)
Delayed Transaction
DRAM Act to PreChrg CMD
DRAM Data Integrity Mode
DRAM Interleave Time
DRAM PreChrg to Act CMD
DRAM Read Latch Delay
Duplex Select
 

 


ECP Mode Use DMA
EPP Mode Select
 
F
(6)
G
(1)

Fast R-W Turn Around
First Boot Device
Flash BIOS Protection
Floppy 3 Mode Support
Force 4-Way Interleave
Force Update ESCD
 

 


Gate A20 Option
 
H
(2)
I
(3)

Hardware Reset Protect
HDD S.M.A.R.T. Capability
 

 


IDE HDD Block Mode
In-Order Queue Depth
Init Display First
ISA 14.318MHz Clock
 

 

J
(0)
K
(1)

 

 


KBC Input Clock Select
 
L
(1)
M
(6)

Level 2 Cache Latency

 


Master Priority Rotation
Master/Slave Drive PIO Mode
Master/Slave Drive UltraDMA
MD Driving Strength
Memory Hole At 15M-16M
MPS Version Control For OS
 

 

N
(0)
O
(7)

 

 


Onboard FDD Controller
Onboard IDE-1 Controller
Onboard IDE-2 Controller
Onboard IR Function
Onboard Parallel Port
Onboard Serial Port 1/2
OS Select For DRAM > 64MB
 

 

P
(17)
Q
(1)

Parallel Port Mode
Passive Release
PCI#2 Access #1 Retry
PCI 2.1 Compliance
PCI Clock/CPU FSB Clock
PCI Delay Transaction
PCI Dynamic Bursting
PCI IRQ Activated By
PCI Latency Timer
PCI Master Read Caching
PCI Master 0 WS Write
PCI Pipeline / PCI Pipelining
PCI/VGA Palette Snoop
PIRQ_0 Use IRQ No. ~ PIRQ_3 Use IRQ No.
PNP OS Installed
Power On Function
Processor Number Feature
 

 


Quick Power On Self Test
 
R
(8)
S
(23)

Read-Around-Write
Read Wait State
Refresh Interval
Refresh Mode Select
Report No FDD For Win95
Reset Configuration Data
Resource Controller By
RxD, TxD Active
 

 


SDRAM Bank Interleave
SDRAM CAS Latency Time
SDRAM Cycle Length
SDRAM Cycle Time Tras/Trc
SDRAM Idle Limit
SDRAM Leadoff Command
SDRAM Page Closing Policy
SDRAM Precharge Control
SDRAM RAS Precharge Time
SDRAM RAS-to-CAS Delay
SDRAM Tras Timing Value
SDRAM Trc Timing Value
SDRAM Trcd Timing Value
SDRAM Trp Timing Value
Second Boot Device
Security Setup
Shadowing Address Ranges
Speed Error Hold
Spread Spectrum
Super Bypass Mode
Super Bypass Wait State
Swap Floppy Drive
System BIOS Cacheable
 

 

T
(4)
U
(7)

Third Boot Device
Typematic Rate (Chars/Sec)
Typematic Rate Delay (Msec)
Typematic Rate Setting
 

 


UltraDMA-66/100 IDE Controller
USB Controller
USB Keyboard Support
USB Keyboard Support Via
USB Mouse Support
USB Mouse Support Via
USWC Write Posting
 

 

V
(4)
W
(2)

Video BIOS Cacheable
Video BIOS Shadowing
Video RAM Cacheable
Virus Warning
 

 


Write Data In to Read Delay
Write Recovery Time
X
(0)
Y
(0)

 

 


 
Z
(0)
No. Of BIOS Options Covered : 135

 

 


 
    
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Revision History

     
Downloads

You can now download this guide in the following formats :-

Note : Please do not redistribute / mirror without prior permission

    
Adobe Acrobat (.PDF) format

Please check the old BIOS Optimization Guide 6.5 for download links
   
Microsoft Reader (.LIT) format
Please check the old BIOS Optimization Guide 6.5 for download links
   

  

  

Comments?

If you have a comment or two about this guide, please post them here.

Thanks for your time and I hope you enjoyed the guide! :)

Adrian Wong
Adrian's Rojak Pot
http://www.rojakpot.com/
http://www.adriansrojakpot.com/

 

 

 
 

 

 
     
   

 

 
 

 
   

 

 
 
Last Updated 12-05-2002

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Copyright © 1998-2002 Adrian Wong. All rights reserved.