MSI K8n Sli H Manual

3-18MS-7100 ATX MainboardMSI Reminds You...
IRQ (Interrupt Request) lines are system resources allocated to I/O
devices. When an I/O device needs to gain attention of the operating
system, it signals this by causing an IRQ to occur. After receiving the
signal, when the operating system is ready, the system will interrupt
itself and perform the service required by the I/O device.** PCI Express relative items **
Maximum Payload Size
This item allows you to set the PCI Express Maximum payload size per time...

3-19 BIOS Setup H/W Monitor
This section shows the status of your CPU, fan, overall system status, etc.
Monitor function is available only if there is hardware monitoring mechanism onboard.
Chassis Intrusion Detect
The field enables or disables the feature of recording the chassis intrusion status
and issuing a warning message if the chassis is once opened. To clear the warning
message, set the field to [Reset]. The setting of the field will automatically return to
[Enabled] later. Setting options:...

3-20MS-7100 ATX MainboardCell Menu
The items in Cell Menu includes some important settings of CPU, AGP, DRAM
and overclocking functions.
Current CPU / DDR Clock
These two items show the current clocks of CPU & DDR. Read-only.
DRAM Configuration
Press  to enter the sub-menu and the following screen appears:
Timing Mode
This field has the capacity to automatically detect all of the DRAM timing. If you
set this field to [Manual], the following fields will be selectable. The settings are:
[Auto],...

3-21 BIOS SetupMemclock index value (Mhz)
When it is set to Manual in “Timing Mode”, user can place an artificial memory
clock on the system. Please note that memory is prevented from running faster
than this frequency. Setting options: [100], [133], [166], [200].
CAS# Latency (Tcl)
When the Timing Mode is set to [Manual], the field is adjustable.This controls
the CAS latency, which determines the timing delay (in clock cycles) before
SDRAM starts a read command after receiving it. Settings: [Auto],...

3-22MS-7100 ATX Mainboard
Read to Write delay (Trwt)
When the Timing Mode is set to [Manual], the field is adjustable. This is not a
DRAM-specified timing parameter, but must be considered due to routing laten-
cies on the clock forwarded bus. It is counted from the first address bus slot
that was not associated with part of the read burst. Available settings: [Auto],
[1T], [2T], [3T], [4T], [5T], [6T].
Write recovery time (Twr)
When the Timing Mode is set to [Manual], the field is adjustable. It...

3-23 BIOS SetupThis is specified in units of 0.5ns. The controller needs to know when to enbale
its DQS receiver in anticipation of the DRAM DQS driver truning on for a read.
The controller will disable its DQS receiver until the read preamble time and then
enable its DQS receiver while the DRAM asserts DQS. Setting options: [2ns], [2.
5ns], [3ns], [3.5ns], [4ns], [4.5ns], [5ns], [5.5ns], [6ns], [6.5ns], [7ns], [7.5ns],
[8ns], [8.5ns], [9ns], [9.5ns].
Async Latency value
When the User Config mode is set...

3-24MS-7100 ATX Mainboard
Adjust CPU FSB Frequency
This item allows you to select the CPU Front Side Bus clock frequency (in MHz).
Select the number between [200]~[400] for needed frequency.
HT Frequency
This setting specifies the maximum operating frequency of the link’s transmitter clock.
Setting options: [1x], [1.5x], [2x], [2.5x], [3x], [4x], [5x].
HT Width
This field allows you to set the HT Width between CPU & Chip.­ mark means Chip to
CPU HT Width. And ¯ mark means CPU to Chip HT Width. Setting...

3-25 BIOS SetupXeon processors. They consist of a new set of instructions that operate on the XXM
and MXCSR registers and perform SIMD operations on double-precision floating-
point values and on integer values.Several of these new SSE/SSE2 instructions also
operate in the MMX registers. Setting options: [Enabled], [Disabled].
Cool’n’Quiet control
This feature is especially designed for AMD Athlon processor, which provides a CPU
temperature detecting function to prevent your CPU’s from overheating due to...

3-26MS-7100 ATX MainboardLoad Fail-Safe/Optimized Defaults
The two options on the main menu allow users to restore all of the BIOS
settings to the default Fail-Safe or Optimized values. The Optimized Defaults are the
default values set by the mainboard manufacturer specifically for optimal performance
of the mainboard. The Fail-Safe Defaults are the default values set by the BIOS
vendor for stable system performance.
When you select Load Fail-Safe Defaults, a message as below appears:
Pressing Y loads...

3-27 BIOS SetupBIOS Setting Password
When you select this function, a message as below will appear on the screen:
Type the password, up to six characters in length, and press . The
password typed now will replace any previously set password from CMOS memory.
You will be prompted to confirm the password. Retype the password and press
. You may also press  to abort the selection and not enter a password.
To clear a set password, just press  when you are prompted to enter the
password. A message will show...