Power Supply - Intel S815EBM1 - Server Board Motherboard Quick Start Manual

Non-ECC and ECC DIMMs (ECC DIMMs will operate in
non-ECC mode only)
Minimum system memory: 32 MB
Maximum system memory: 512 MB
NOTE
The BIOS cannot determine DIMM size or type when not initialized. If
more than 512 MB system memory is installed, the BIOS displays a
message at boot indicating memory above 512 MB has not been
initialized. The message indicates that additional information is available
in Setup. The first time the BIOS detects this condition, a pause follows
the message with the option to enter.
Setup or to <ESC> and continue to boot. The message continues to be
displayed at boot time as long as the condition exists, however, the BIOS
will not pause on subsequent detection. Setup displays the installed
memory configuration and shows memory above 512 MB as
"not initialized."

Power Supply

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If the Wake On LAN (WOL) and Instantly Available technology features are
used, ensure that the power supply current required depends on the wake devices
supported. Please see the S815EBM1 Technical Product Specification for more
details.
4 Intel Server Board S815EBM1 Quick Start Guide