Intel E5-1428L CM8062001144000 Data Sheet

All processors within a system must run at a common maximum non-Turbo ratio. The

system BIOS may be required to program the FLEX_RATIO register if mixed frequency

processors are populated.

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 Intel

 64 and IA-32 Architectures Software Developer's Manuals,

Volume 2A: Instruction Set Reference, A-M.

The Flexible Motherboard (FMB) guidelines are estimates of the maximum values the

Intel

®

 Xeon

®

 processor v3 product families 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.

The table below specifies 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.

V

CCIN

Processor input voltage with respect to Vss

-0.3

1.98

V

V

CCD

Processor IO supply voltage for DDR4

(standard voltage) with respect to V

SS

-0.3

1.35

V

V

CCIO_IN

IO voltage supply input with respect to V

SS

-0.3

1.35

V

V

CCPECI

Power supply for PECI with respect to V

SS

-0.3

1.35

V

Note: 
1. For functional operation, all processor electrical, signal quality, mechanical, and thermal specifications

must be satisfied.

Intel

®

 Xeon

®

 Processor E5-1600 and E5-2600 v3 Product Families, Volume 1 of 2, Electrical

September 2014

Datasheet

Order No.: 330783-001

29