Intel® Server System R2000WF Product Family Technical Product Specification
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3.7
Smart Ride Through (SmaRT)
The server system has support for Smart Ride Through Throttling (SmaRT) which increases the reliability for
a system operating in a heavy power load condition and to remain operational during an AC line dropout
event. For power supply hold up time requirements for AC line dropout events, see section 3.3.4.
When AC voltage is too low, a fast AC loss detection circuit inside each installed power supply asserts an
SMBALERT# signal to initiate a throttle condition in the system. System throttling reduces the bandwidth to
both system memory and CPUs, which in turn reduces the power load during the AC line drop out event
3.8
Server Board Power Connectors
The server board provides several connectors to provide power to various system options. This section
provide the pin-out definition and a brief usage description for each.
3.8.1
Power Supply Module Card Edge Connector
Each power supply module has a single 2x25 card edge output connection that plugs directly into a
matching slot connector on the server board. The connector provides both power and communication
signals to the server board. The following table defines the connector pin-out.
Table 33. Power supply module output power connector pin-out
Pin
Name
Pin
Name
A1
GND
B1
GND
A2
GND
B2
GND
A3
GND
B3
GND
A4
GND
B4
GND
A5
GND
B5
GND
A6
GND
B6
GND
A7
GND
B7
GND
A8
GND
B8
GND
A9
GND
B9
GND
A10
+12V
B10
+12V
A11
+12V
B11
+12V
A12
+12V
B12
+12V
A13
+12V
B13
+12V
A14
+12V
B14
+12V
A15
+12V
B15
+12V
A16
+12V
B16
+12V
A17
+12V
B17
+12V
A18
+12V
B18
+12V
A19
PMBus SDA
B19
A0 (SMBus address)
A20
PMBus SCL
B20
A1 (SMBus address)
A21
PSON
B21
12 VSB
A22
SMBAlert#
B22
Cold redundancy bus
A23
Return sense
B23
12V load share bus
A24
+12V remote sense
B24
No connect
A25
PWOK
B25
Compatibility check pin
3.8.2
Optional 12 V Power Connectors for High Power Add-in Cards
The server board includes two white 2x2-pin power connectors that provide supplemental power to high
power PCIe x16 add-in cards (Intel® Xeon Phi™ or non-Intel GPGPU) that have power requirements that
