User guide

2-2 Chapter 2: Hardware information
AGP warning LED
This LED (WARN1) is a smart protection from motherboard burn out
caused by an incorrect AGP card. If you plug in any 3.3V AGP card into
the 1.5V AGP slot, this LED lights up thus preventing the system to power
up. This LED remains off if you plug in a 1.5V AGP card.
CPU FSB/voltage LED
This LED (LED1) lights up if you installed two CPUs with different front
side bus (FSB), or if the CPU voltage is not stable.
CPU warning LED
This red LED (WARN_CPU1) lights up if:
• there is no installed CPU on either one of the sockets
• you installed a CPU on socket CPU2, but not on socket CPU1
(if installing only one CPU, you must install on socket CPU1)
• you installed CPUs of different types, e.g. an Intel
®
Xeon™ processor
with 800 MHz FSB and an Intel
®
Xeon™ processor with 533 MHz FSB
(install identical CPUs, either two Intel
®
Xeon™ processors with
800 MHz FSB, or two Intel
®
Xeon™ processors with 533 MHz FSB)
NCCH-DL
®
NCCH-DL Warning LEDs
LED1
WARN1
WARN_CPU1
No CPU installed
No CPU on socket CPU1
CPU types mismatched
ON OFF
No detected CPU problem
ON
CPU voltage not stable
CPU FSB not identical
OFF
No detected CPU problem
ON
Incorrect AGP Card
OFF
Correct AGP Card