AOpen AX59PRO User Manual page 89

Frequently Asked Questions
Features
VGA card
Network card
Support DMI BIOS 2.0
Support Win95
Support Win NT
Real-Time CPU/Memory
Utilization Monitoring
Multi-Machine
Monitoring on One Screen
Remote Management
Protocol
Standard SNMP Trap
Remote File Transfer
Q: Why do AOpen MBs use many Electrolytic Capacitors instead
Tantalum Capacitor?
A: The quality of Electrolytic capacitor has huge difference depends on model
and vendor. Normally, Tantalum capacitor is better than Electrolytic capacitor,
but good quality and high price Electrolytic capacitor is even better than
Tantalum capacitor. Originally, AOpen motherboards use 100uF Tantalum
capacitor nears CPU to reduce voltage ripple, but the technology improvement
has introduced an 1000uF very low ESR (Equivalent Serial Resistor) of
Electrolytic capacitor with only 0.15 ohm comparing with 0.7 ohm of Tantalum
capacitor. The lower the ESR and higher the capacitance value, the smaller
the CPU voltage ripple.
Following are the specifications of capacitors that AOpen is currently using:
Tantalum:
Electrolytic:
A-8
ADM 2.0
No limitation
No limitation
Yes
Yes
No (will be supported
on ADM 2.1)
Yes
Yes
Standard SNMP
protocol
Yes (so that can work
with standard software
such as HP Open View)
No
SPRAGUE 100uF,
Part number 595D107X06R3C2T,
Max ESR is 0.7 at 25 degree 100KHz.
SANYO 1000uF,
Part number 16MV1000CG,
Max ESR is 0.15 at 20 degree 100khz.
LDCM 3.0
Only ATI
Only Intel
Yes
Yes
Yes
No
No
Intel proprietary RAP
protocol
No
Yes
of