Power Supply Considerations - Fujitsu Siemens Computers D1691 Technical Manual

Chapter 2: Choose Proper Parts For Your System

2.4 - Power Supply Considerations

● Power connectors
Thunder i7525 S2676 board supports EPS/12V power supply unit (PSU) with three power
connectors listed below.
EPS/12V Power Connectors
24-pin system power connector
● Split processor power planes
Thunder i7525 S2676 board supports dual Intel's 800 MHz FSB Xeon
could reach up to 140 Watts per processor. (Check Intel's web for the processor
specifications.) By following SSI EEB v3.51 specifications, Thunder i7525 S2676 is designed
with two separate voltage regulator circuits to provide the power for both onboard processors
in separate power rail. Using a power supply with a combined CPU power plane from the CPU
power connector is not allowed and may cause the system to fail to power up or damage to the
power supply.
● Power requirements
Check your power supply specifications to ensure sufficient power currents for each power rail
based on your system configuration.
The major system components/parts power sources are listed below as reference:
Components/Parts
CPU1
CPU2
Memory (Normal)
Memory
(Suspend to RAM)
System logic
X16 PCI-Express
Graphic card
X8 PCI-Express
32-bit PCI
Cooling fans
IDE/SATA hard drives
CDROM/DVD drives
10
Main Power Source
+12V_CPU1
+12V_CPU2
+12V
+5Vstandby
+3.3V
+12V and +3.3V
+12V and +3.3V
+12V, +5V and +3.3V
+12V
+12V and +5V
+12V and +5V
+
8-pin CPU power connector
(split CPU power planes)

processors, which
Power Connectors
8-pin CPU power connector
8-pin CPU power connector
24-pin and 6-pin power connectors
24-pin power connector
24-pin and 6-pin power connectors
24-pin and 6-pin power connectors
24-pin and 6-pin power connectors
24-pin and 6-pin power connectors
24-pin and 6-pin power connectors
From PSU
From PSU
A26361-D1691-Z120-1-7619, Edition 1