Intel E5-2600, E5-4600 Flexible Motherboard Guidelines FMB, Absolute Maximum and Minimum Ratings

Electrical Specifications

Technology transitions signal. Please refer to the Intel® 64 and IA-32 Architectures Software Developer’s Manual (SDM) Volumes 1, 2, and 3 for details on the FLEX_RATIO

MSR and setting the processor core frequency.

Not all operating systems can support dual processors with mixed frequencies. Mixing processors of different steppings but the same model (as per CPUID instruction) is supported provided there is no more than one stepping delta between the processors, for example, S and S+1.

S and S+1 is defined as mixing of two CPU steppings in the same platform where one CPU is S (stepping) = CPUID.(EAX=01h):EAX[3:0], and the other is S+1 = CPUID.(EAX=01h):EAX[3:0]+1. The stepping ID is found in EAX[3:0] after executing the CPUID instruction with Function 01h.

Details regarding the CPUID instruction are provided in the AP-485, Intel® Processor Identification and the CPUID Instruction application note. Also refer to the Intel® Xeon® Processor E5 Prodcut Family Specification Update.

7.6Flexible Motherboard Guidelines (FMB)

The Flexible Motherboard (FMB) guidelines are estimates of the maximum values the processor will have over certain time periods. The values are only estimates and actual specifications for future processors may differ. Processors may or may not have specifications equal to the FMB value in the foreseeable future. System designers should meet the FMB values to ensure their systems will be compatible with future processors.

7.7Absolute Maximum and Minimum Ratings

Table 7-9specifies absolute maximum and minimum ratings. At conditions outside functional operation condition limits, but within absolute maximum and minimum ratings, neither functionality nor long-term reliability can be expected. If a device is returned to conditions within functional operation limits after having been subjected to conditions outside these limits, but within the absolute maximum and minimum ratings, the device may be functional, but with its lifetime degraded depending on exposure to conditions exceeding the functional operation condition limits.

Although the processor contains protective circuitry to resist damage from Electro- Static Discharge (ESD), precautions should always be taken to avoid high static voltages or electric fields.

Table 7-9. Processor Absolute Minimum and Maximum Ratings

	Symbol	Parameter	Min	Max	Unit
	VCC	Processor core voltage with respect to Vss	-0.3	1.4	V
	VCCPLL	Processor PLL voltage with respect to Vss	-0.3	2.0	V
	VCCD	Processor IO supply voltage for DDR3	-0.3	1.85	V
		(standard voltage) with respect to VSS
	VCCD	Processor IO supply voltage for DDR3L (low	-0.3	1.7	V
		Voltage) with respect to VSS
	VSA	Processor SA voltage with respect to VSS	-0.3	1.4	V
	VTTA	Processor analog IO voltage with respect to	-0.3	1.4	V
	VTTD	VSS
166		Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
				Datasheet Volume One