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General Specifications
From 1.8V regulator
From 2.5V regulator
2. 4 *DDR 200: (7.2*2 + 1.1*2 ) = 16.6A
4 *DDR 266: (9*2 + 1.375*2 ) = 20.75A
DDR Vtt 6.2A
9.3
Mean Time Between Failures (MTBF) Test Results
This section provides results of MTBF as supplied by non-Intel testing. MTBF is a common
server board testing that validates server boards for reliability and performance under extreme
working conditions. Time between failures was measured at 108,621 hours when tested at 40
degrees Centigrade.
9.4
Power Supply Constraints
9.4.1
SC5200 Base Chassis Timing requirements with the ICH3-S
The SC5200 Base chassis's front panel power switch will not power on if held between 1-4
seconds, because the timing of the ICH3-S component of the E7500 chipset reads power in 1
and 4 second cycles. In other words, if you hold the power button for 1, 2, 3, or 4, seconds the
power won't power on, POST will not occur, and the Operating System will not boot. If pressing
the power button doesn't power on the server it is recommend that you press a second time to
guarantee successful power on. Also, if you press the power button for less than 1 second it will
power on. These exceptions may require special attention to the SE7500CW2 baseboard when
power-cycling.
9.4.2
BIOS <F2> "Stay off" switch limitations
BIOS setup <F2> switch "Power | Power Loss Control | Stay Off" has a built in limitation, which
may be seen under rare brown-out (i.e. blackout) situations. What may happen if power to the
power-supply is off for less than 3 seconds the reactivated "Stay Off" switch will allow the server
to boot although the Microsoft Windows* operating system may not be loaded. This is by design
but may cause confusion to system administrators when the server starts to reboot, and the
POST states that the "Operating System not found", despite being told to remain off in BIOS with
the "Stay Off" switch. Also, since BIOS interacts differently with different Power-supplies it was
determined to leave this small limitation of the "Stay Off" switch. If power is lost for more that 3
seconds then the BIOS switch will work correctly and always leave the server without power.
98
Revision 1.40
SE7500CW2 Server Board Technical Product Specification
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