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Welcome To

The Definitive
BIOS Optimization Guide

Revision 11.0



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BIOS Optimization Guide
BIOS Option Name Published Date
 
System Bus
16-Bit Recovery Time 11 Aug 2003
8-bit I/O Recovery Time 21 Aug 2003
AT Bus Clock 10 Sep 2003
Auto Detect DIMM/PCI Clk 07 Feb 2009
Auto Turn Off PCI Clock Pin 22 Nov 2005
Burn-In Mode 14 Aug 2005
Byte Merge 20 Aug 2003
CPU Spread Spectrum 04 Mar 2009
CPU to PCI Post Write 20 Aug 2003
CPU to PCI Write Buffer 20 Aug 2003
Delayed Transaction 01 Sep 2003
Differential Current 07 Jun 2004
Disable Unused PCI Clock 22 Nov 2005
FSB Spread Spectrum 04 Mar 2009
Host Burn-in Mode 14 Aug 2005
ISA 14.318MHz Clock 10 Sep 2003
ISA Enable Bit 10 Sep 2003
Master Priority Rotation 13 Sep 2003
Maximum Read Request Size 29 Jan 2007
MCLK Spread Spectrum 14 Mar 2009
P2C C2P Concurrency 18 Sep 2003
Passive Release 19 Sep 2003
PCI 2.1 Compliance 19 Sep 2003
PCI Burn-in Mode 26 Aug 2005
PCI Bus Parking 07 Oct 2005
PCI Chaining 23 Sep 2003
PCI Clock / CPU FSB Clock 23 Sep 2003
PCI Clock Synchronization Mode 25 Sep 2005
PCI Delay Transaction 04 Sep 2003
PCI Dynamic Bursting 04 Sep 2003
PCI Express Burn-in Mode 26 Aug 2005
PCI Express Clock 26 Oct 2008
PCI IRQ Activated By 23 Sep 2003
PCI Latency Timer 23 Sep 2003
PCI Master 0 WS Read 23 Sep 2003
PCI Master 0 WS Write 23 Sep 2003
PCI Master Bus Timeout 15 Oct 2005
PCI Master Bus Timeout Control 15 Oct 2005
PCI Master Read Caching 23 Sep 2003
PCI Pipelining 23 Sep 2003
PCI Prefetch 04 Sep 2003
PCI Target Latency 23 Sep 2003
PCI Timeout 09 Aug 2005
PCI to DRAM Prefetch 19 Sep 2003
PCI#2 Access #1 Retry 19 Sep 2003
PCI-E Compliance Mode 09 Oct 2006
PCI-E Max Read Request Size 29 Jan 2007
PCI-E Maximum Payload Size 24 Jan 2007
PCI-E Reference Clock 26 Oct 2008
PCIE Spread Spectrum 14 Mar 2009
PSB Parking 07 Oct 2005
SM I/O Buffers Control 27 Jul 2005
Split Lock Operations 09 Nov 2003
Suppress Unused PCI Slot Clocks 14 Oct 2006
Synchronous Mode Select 10 Nov 2003
V-Link 8X Support 17 Nov 2005
V-Link Data 2X Support 27 Dec 2006
V-Link Data Rate 17 Nov 2005
V-Link Mode Selection 17 Nov 2005
 
Storage Subsystem
32-bit Disk Access 16 Aug 2003
32-bit Transfer Mode 16 Aug 2003
ARMD Emulation Type 15 Dec 2006
ATA(PI) 80-Pin Cable Detection 28 Oct 2006
ATA100RAID IDE Controller 21 Aug 2003
DRDY Timing 10 Apr 2007
EXT-P2P's Discard Time 11 Mar 2007
Floppy Disk Access Control 18 May 2004
Hard Disk Pre-Delay 09 Aug 2005
HDD Self Diagnostic 07 Aug 2005
HDD SMART Capability 10 Sep 2003
IDE Bus Master Support 10 Sep 2003
IDE Detect Time Out 22 Dec 2008
IDE DMA Transfer Access 27 Jul 2005
IDE HDD Block Mode 10 Sep 2003
IDE Prefetch Mode 19 Sep 2005
IDE/RAID Control 16 Feb 2007
Intel RAID Technology 29 Nov 2005
Keyboard Auto-Repeat Delay 18 May 2004
Keyboard Auto-Repeat Rate 18 May 2004
Master Drive PIO Mode 13 Sep 2003
Master Drive UltraDMA 13 Sep 2003
Multi-Sector Transfers 21 Aug 2004
Onboard FDC Swap A & B 18 May 2004
Onboard FDD Controller 13 Sep 2003
Onboard IDE-1 Controller 18 Sep 2003
Onboard IDE-2 Controller 18 Sep 2003
OnChip IDE Channel 0 03 Oct 2005
OnChip IDE Channel 1 03 Oct 2005
PCI IDE Busmaster 19 Sep 2003
PIO Mode 23 May 2004
SATA AHCI Mode 14 Nov 2008
SATA Mode 19 Nov 2008
SATA Operation Mode 19 Nov 2008
SATA Spread Spectrum 14 Mar 2009
Secondary SATA Controller 28 Dec 2006
Serial ATA Controller 28 Dec 2006
Slave Drive PIO Mode 06 May 2004
Slave Drive UltraDMA 06 May 2004
Swap Floppy Drive 10 Nov 2003
Ultra DMA Mode 21 May 2004
UltraDMA-100 IDE Controller 21 May 2004
UltraDMA-133 IDE Controller 21 May 2004
UltraDMA-66 IDE Controller 21 May 2004
USB Zip Emulation 09 Jan 2007
 
Memory Subsystem
2T Command 29 Sep 2005
32 Byte Granularity 27 Jul 2009
32 Byte Granulation 31 Jul 2009
ACPI SRAT Table 14 Oct 2006
Act Bank A to B CMD Delay 21 Aug 2003
Asynclat 26 Feb 2007
Bank Swizzle Mode 16 Jul 2009
Chipkill 13 Dec 2006
CPU-DRAM 21 Aug 2004
DCLK Feedback Delay 07 Jul 2005
DCQ Bypass Maximum 22 Jul 2009
Delay DRAM Read Latch 01 Sep 2003
Digital Locked Loop (DLL) 26 Dec 2008
Disable Jitter 13 Feb 2007
DQS Training Control 07 Mar 2009
DRAM Act to PreChrg CMD 03 Apr 2004
DRAM Burst Length 8QW 18 May 2004
DRAM Bus Selection 07 Jul 2005
DRAM Data Integrity Mode 01 Sep 2003
DRAM Idle Timer 19 Mar 2007
DRAM Interleave Time 02 Sep 2003
DRAM page mode 21 Aug 2004
DRAM PreChrg to Act CMD 03 Apr 2004
DRAM Ratio 01 Sep 2003
DRAM Ratio HW Strap 01 Sep 2003
DRAM Read Latch Delay 01 Sep 2003
DRAM Refresh Rate 10 Sep 2003
DRAM Termination 10 Mar 2009
Dynamic Counter 18 Jul 2009
Dynamic Idle Cycle Counter 16 Mar 2007
Fast R-W Turn Around 07 Sep 2003
Fast Write to Read Turnaround 21 Aug 2004
Force 4-Way Interleave 07 Sep 2003
Gate A20 Option 10 Sep 2003
Idle Cycle Limit 18 Jul 2009
LD-Off Dram RD/WR Cycles 21 Aug 2004
Max Async Latency 24 Feb 2007
MD Driving Strength 13 Sep 2003
Memory DQ Drive Strength 21 Mar 2007
Memory Hole At 15M-16M 13 Sep 2003
Node Memory Interleave 14 Oct 2006
On-Die Termination 10 Mar 2009
OS Select For DRAM > 64MB 19 Jul 2005
OS2 Onboard Memory > 64M 19 Jul 2005
OverWrite Rx6C 11 Oct 2005
OverWrite Rx6D 11 Oct 2005
R/W Queue Bypass 22 Jul 2009
Rank Interleave 23 May 2004
Read Around Write 08 Oct 2003
Read Preamble Time 11 Feb 2007
Read Wait State 08 Oct 2003
Refresh Interval 19 Sep 2003
Refresh Mode Select 19 Sep 2003
Rx6C OverWrite 11 Oct 2005
Rx6D OverWrite 11 Oct 2005
SDRAM 1T Command 06 Apr 2004
SDRAM 1T Command Control 06 Apr 2004
SDRAM Active to Precharge Delay 21 Aug 2004
SDRAM Bank Interleave 24 Oct 2003
SDRAM Bank-to-Bank Delay 14 Apr 2004
SDRAM Burst Len 24 Oct 2003
SDRAM Burst Length 24 Oct 2003
SDRAM CAS Latency Time 03 Apr 2004
SDRAM Command Leadoff Time 21 Aug 2004
SDRAM Command Rate 06 Apr 2004
SDRAM Cycle Length 03 Apr 2004
SDRAM Cycle Time Tras/Trc 03 Apr 2004
SDRAM ECC Setting 06 May 2004
SDRAM Idle Limit 19 Mar 2007
SDRAM Leadoff Command 21 Aug 2004
SDRAM Page Closing Policy 21 Aug 2004
SDRAM Page Hit Limit 21 Aug 2004
SDRAM PH Limit 21 Aug 2004
SDRAM Precharge Control 21 Aug 2004
SDRAM RAS Precharge Delay 21 Aug 2004
SDRAM RAS Precharge Time 06 Apr 2004
SDRAM RAS Pulse Width 06 Apr 2004
SDRAM RAS-to-CAS Delay 03 Apr 2004
SDRAM Row Active Time 06 Apr 2004
SDRAM Row Cycle Time 14 Apr 2004
SDRAM Tras Timing Value 14 Apr 2004
SDRAM Trc Timing Value 14 Apr 2004
SDRAM Trcd Timing Value 06 May 2004
SDRAM Trp Timing Value 06 May 2004
SDRAM Trrd Timing Value 14 Apr 2004
SDRAM Write Recovery Time 18 May 2004
SDRAM Write-to-Read Command Delay 21 May 2004
Shadowing Address Ranges 06 May 2004
Share Memory Size 02 Jan 2006
Super Bypass Mode 09 Nov 2003
Super Bypass Wait State 09 Nov 2003
SuperStability Mode 09 Nov 2003
Write CAS Latency (Twcl) 07 Jul 2005
Write Data In to Read Delay 21 May 2004
Write Recovery Time 18 May 2004
 
Graphics Subsystem
AGP 2X Mode 21 Aug 2003
AGP 3.0 Calibration Cycle 03 Oct 2005
AGP 4X Drive Strength 21 Aug 2003
AGP 4X Mode 21 Aug 2003
AGP 8X Mode 21 Aug 2003
AGP Always Compensate 21 Aug 2003
AGP Aperture Size 21 Aug 2003
AGP Capability 23 May 2004
AGP Clock / CPU FSB Clock 21 Aug 2003
AGP Comp. Driving 29 Nov 2005
AGP Drive Strength 21 Aug 2003
AGP Drive Strength N Ctrl 21 Aug 2003
AGP Drive Strength P Ctrl 21 Aug 2003
AGP Driving Control 21 Aug 2003
AGP Driving Value 29 Nov 2005
AGP Fast Write 23 Sep 2005
AGP ISA Aliasing 21 Aug 2003
AGP Master 1WS Read 21 Aug 2003
AGP Master 1WS Write 21 Aug 2003
AGP Performance Control 19 Jul 2005
AGP Prefetch 21 Aug 2003
AGP Read Synchronization 31 Jul 2005
AGP Secondary Lat Timer 26 Sep 2003
AGP Spread Spectrum 04 Mar 2009
AGP to DRAM Prefetch 21 Aug 2003
AGP/PCI Burn-in Mode 14 Aug 2005
AGPCLK / CPUCLK 21 Aug 2003
Anti-Dot Crawl 09 Oct 2006
CPU Direct Access FB 18 Oct 2006
DBI Output For AGP Trans 01 Sep 2003
Direct Frame Buffer 05 Jan 2006
Display Card Priority 18 Oct 2006
Dithering 06 Apr 2007
DVMT Memory Size 08 Jan 2006
DVMT Mode 19 Dec 2005
DVMT Mode Select 26 Dec 2005
DVMT/FIXED Memory 26 Dec 2005
FIXED Memory Size 08 Jan 2006
Flat Panel Type 09 Oct 2006
Frame Buffer Size 02 Jan 2006
Graphic Win Size 02 Sep 2003
Graphic Window 21 Aug 2004
Graphics Aperture Size 21 Aug 2004
IGD DVMT Memory 26 Dec 2005
Internal Graphics Mode Select 09 Oct 2006
LCD Power Saving 14 Nov 2008
Manual AGP Comp. Driving 29 Nov 2005
Maximum Payload Size 24 Jan 2007
Maximum TLP Payload 24 Jan 2007
No Mask of SBA FE 13 Sep 2003
NVIDIA GPU Ex 31 Jul 2009
On-Chip Frame Buffer Size 02 Jan 2006
OnChip VGA Mode Select 02 Jan 2006
Panel Type 10 Oct 2008
PAVP Lite Mode 11 May 2010
PAVP Mode 11 May 2010
PAVP Paranoid Mode 11 May 2010
PCI Express Selector 04 Feb 2009
PCI/VGA Palette Snoop 03 Oct 2003
PEG Force X1 13 Jan 2006
PEG Link Mode 07 Feb 2009
PEG Port 27 Jan 2006
PEG Port VC1/Map 27 Jan 2006
PEG/Onchip VGA Control 08 Jan 2006
Post Write Combine 05 Oct 2003
Primary Graphics Adapter 04 Sep 2003
Primary VGA BIOS 19 Sep 2003
Search for MDA Resources 19 Jul 2005
TV Standard 31 Dec 2006
TV Type 31 Dec 2006
USWC Write Posting 14 Oct 2003
VGA Share Memory Size 02 Jan 2006
Video BIOS Cacheable 22 Nov 2003
Video BIOS Shadowing 22 Nov 2003
Video Memory Cache Mode 17 Aug 2005
Video RAM Cacheable 15 Dec 2003
 
Miscellaneous
AC PWR Auto Recovery 26 Mar 2007
Anti-Virus Protection 21 Aug 2003
ASF Support 03 Oct 2006
Debug Code Control 08 Oct 2008
Duplex Select 02 Sep 2003
Fixed Disk Boot Sector 28 Dec 2006
Flash BIOS Protection 07 Sep 2003
Floppy 3 Mode Support 07 Sep 2003
Hardware Reset Protect 10 Sep 2003
HPET Mode 24 Oct 2008
HPET Support 24 Oct 2008
I/O Interface Security 06 Nov 2008
KBC Input Clock Select 13 Sep 2003
LAN ROM Protocol 11 May 2010
MAC Address Input 07 Feb 2007
MAC LAN 21 Jul 2005
MAC Media Interface 07 Aug 2005
MAC PHY IEEE Test 21 Jul 2005
Machine MAC Address 07 Feb 2007
Onboard IR Function 18 Sep 2003
Onboard Parallel Port 18 Sep 2003
Onboard Serial Port 1 18 Sep 2003
Onboard Serial Port 2 18 Sep 2003
Onboard USB Controller 18 Sep 2003
Parallel Port Mode 19 Sep 2003
POST Check LAN Cable 22 Dec 2008
Power On Function 05 Oct 2003
PS/2 Mouse Function Control 18 May 2004
PWRON After PWR-Fail 26 Mar 2007
RxD, TxD Active 14 Oct 2003
Security Setup 10 Nov 2003
Spread Spectrum 04 Mar 2009
Start Battery Calibration 04 Feb 2009
Typematic Rate 06 May 2004
Typematic Rate Delay 06 May 2004
Typematic Rate Setting 06 May 2004
USB Controller 10 Nov 2003
USB Keyboard Support 21 Aug 2004
USB Legacy Support 03 Oct 2006
USB Mouse Support 21 May 2004
USB Port 64/60 Emulation 03 Oct 2006
Virus Warning 10 Nov 2003
Watch Dog Timer Select 03 Oct 2006
Watchdog Timer 21 Aug 2004
 
System Resource Management
ACPI 2.0 Support 10 Oct 2008
ACPI APIC Function 21 Oct 2006
APIC Function 22 Nov 2005
Assign IRQ For USB 21 Aug 2003
Assign IRQ For VGA 21 Aug 2003
ECP Mode Use DMA 02 Sep 2003
EPP Mode Select 07 Sep 2003
FDD IRQ Can Be Free 29 Sep 2005
Force Update ESCD 10 Sep 2003
Interrupt Mode 23 Sep 2003
IOAPIC Enable 22 Nov 2005
MPS Control Version For OS 02 Sep 2003
MPS Revision 13 Sep 2003
OnChip USB 22 Apr 2010
PIRQ x Use IRQ No. 03 Oct 2003
PNP OS Installed 05 Oct 2003
Resource Controlled By 14 Oct 2003
USB Memory Type 22 Apr 2010
 
Bootstrap Management
ACPI Headless Mode 23 Dec 2006
Add-On ROM Display Mode 06 Jan 2007
Boot Other Device 20 Aug 2003
Boot Sequence 20 Aug 2003
Boot Sequence EXT Means 20 Aug 2003
Boot To OS2 19 Jul 2005
Boot Up Floppy Seek 20 Aug 2003
Boot Up NumLock Status 20 Aug 2003
CPUID Maximum Value Limit 30 Aug 2005
Delay IDE Initial 01 Sep 2003
Display Small Logo 14 Oct 2006
DOS Flat mode 21 Aug 2004
Expansion Card Text 06 Jan 2007
Extended CPUID Function 05 Jan 2006
First Boot Device 07 Sep 2003
Full Screen Logo 23 May 2004
Headless Mode 23 Dec 2006
Hit 'DEL' Message Display 31 Jan 2007
Init Display First 02 Sep 2003
Intel Rapid BIOS Boot 11 Jan 2007
Interrupt 19 Capture 23 Sep 2005
ISA Shared Memory 31 Dec 2008
LAN Boot ROM 26 Dec 2008
Overclock Recovery 08 Oct 2008
Quick Boot 11 Jan 2007
Quick Power On Self Test 11 Jan 2007
Quiet Boot 13 Jan 2006
Report No FDD For Win95 14 Oct 2003
Reserved Memory Size 31 Dec 2008
Reset Configuration Data 14 Oct 2003
Second Boot Device 09 Nov 2003
Show Summary Information 14 Oct 2006
Silent Boot 26 Aug 2005
Small Logo (EPA) Show 13 Jan 2006
System BIOS Cacheable 06 May 2004
Third Boot Device 10 Nov 2003
USB Emulation Mode 03 Jan 2009
USB Flash Disk Type 03 Jan 2009
USB Mass Storage Reset Delay 03 Jan 2009
Wait For 'F1' If Error 20 Dec 2006
 
Processor
Adjacent Cache Line Prefetch 18 Oct 2006
Athlon 4 SSED Instruction 21 Aug 2003
BCLK Frequency 16 Feb 2009
Bypass Max 27 Jul 2009
Clock Throttle 21 Aug 2004
Compatible FPU OPCODE 20 Aug 2003
CPU Adjacent Sector Prefetch 08 Sep 2005
CPU Differential Amplitude 29 Nov 2008
CPU Drive Strength 20 Aug 2003
CPU Fast String 20 Aug 2003
CPU Hardware Prefetch 21 Oct 2006
CPU Hyper-Threading 20 Aug 2003
CPU Internal Thermal Control 17 Apr 2010
CPU L2 Cache ECC Checking 20 Aug 2003
CPU Latency Timer 21 Aug 2004
CPU Level 1 Cache 20 Aug 2003
CPU Level 2 Cache 20 Aug 2003
CPU Level 3 Cache 20 Aug 2003
CPU On-Die Termination 13 Jul 2009
CPU Thermal Monitor 13 Apr 2010
CPU Thermal-Throttling 21 Aug 2004
CPU VCore Voltage 20 Aug 2003
Data Prefetch Logic 24 Oct 2006
Delay Prior To Thermal 01 Sep 2003
Errata 123 Enhancement 28 Oct 2005
Errata 123 Option 28 Oct 2005
Errata 94 Enhancement 26 Oct 2005
Errata 94 Option 26 Oct 2005
Execute Disable Bit 19 Oct 2005
FPU OPCODE Compatible Mode 02 Sep 2003
Hardware Prefetch Queue 24 Oct 2006
Hardware Prefetcher 24 Oct 2006
Host Bus In-Queue Depth 03 Oct 2003
Hyper Threading Technology 02 Sep 2003
In-Order Queue Depth 10 Sep 2003
Intel Dynamic Acceleration 11 Nov 2008
Intel Turbo Mode Tech 11 Nov 2008
IOQD 03 Oct 2003
K7 CLK CTL Select 10 Sep 2003
L1 Data Cache Context Mode 16 Sep 2005
L2 Streaming Prefetch 18 Oct 2006
L3 Cache 13 Sep 2003
Level 2 Cache Latency 13 Sep 2003
Limit CPUID Max. To 3 23 Oct 2005
Max CPUID Value Limit 18 Oct 2006
MP Capable Bit Identify 21 Aug 2004
N/B Strap CPU As 13 Sep 2003
No-Execute Memory Protect 19 Oct 2005
NX BIOS Control 05 Jan 2006
NX Technology 08 Sep 2005
Odd Divisor Correct 18 Feb 2007
PPM Mode 11 May 2010
Processor Number Feature 05 Oct 2003
S2K Bus Driving Strength 14 Oct 2003
S2K Strobe N Control 14 Oct 2003
S2K Strobe P Control 14 Oct 2003
Speed Error Hold 09 Nov 2003
SSE/SSE2 Instructions 19 Jul 2005
SW Single Processor Mode 09 Aug 2005
Thermal Management 13 Apr 2010
TM2 Bus Ratio 17 Apr 2010
TM2 Bus VID 17 Apr 2010
UCLK Frequency 16 Feb 2009
Vanderpool Technology 16 Jul 2009
Virtualization 13 Jul 2009
Virtualization Technology 31 Jan 2007
XD Technology 08 Sep 2005
 
   
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