
Intel® Server Board SE7520BD2 Technical Product Specification
Product Overview
Revision 1.3
Intel Confidential
13
2.7.4
Reset Configuration Logic
The BIOS determines the processor stepping, cache size, etc., through the CPUID instruction.
All processors in the system must operate at the same frequency, have the same cache size,
and have the same voltage identification (VID). No mixing of product families is supported.
Processors run at a fixed speed and cannot be programmed to operate at a lower or higher
speed.
2.7.5 Processor
Module
Presence
Detection
Logic is provided on the baseboard to detect the presence and identity of installed processors.
In dual-processor configurations, the onboard mini Baseboard Management Controller (mBMC)
must read the processor VID bits for each processor before turning on the VRD. If the VIDs of
the two processors are not identical, then the BMC will not turn on the VRD.
The following circuit is designed to ensure that three criteria are met prior to enabling the
embedded VRD:
•
Ensure that in a UP configuration, the end agent CPU (P1) is installed
•
Disable older-generation Intel® Xeon™ processors from running in the system to
prevent damage to the MCH
•
Ensure in a DP configuration that both processors support the same FSB frequency
2.7.6 GTL2006*
The GTL2006* is a 13-bit translator designed for 3.3V to GTL/GTL+ translations to the system
bus. The translator incorporates all the level shifting and logic functions required to interface
between the processor subsystem and the rest of the system.
2.7.7
Common Enabling Kit (CEK) Design Support
The baseboard has been designed to comply with Intel’s Common Enabling Kit (CEK)
processor mounting and heat sink retention solution. The baseboard as shipped from Intel’s
factory will ship with a CEK spring snapped onto the bottom side of the board beneath each
processor socket. The CEK spring is removable allowing for the use of non-Intel heat sink
retention solutions.
Heat sink assembly
with integrated
hardware
TIM
Baseboard
CEK Spring
Chassis