Intel X3460 BV80605001908AL User Manual

Datasheet, Volume 1

71

1.

V

TT

 must be provided using a separate voltage source and not be connected to V

CC

. The voltage 

specification requirements are defined in the middle of the VTT pinfield at the processor socket vias on the 

bottom side of the baseboard. The voltage specifications are measured with a 20-MHz bandwidth 

oscilloscope, 1.5 pF maximum probe capacitance, and 1 M minimum impedance. The maximum length of 

ground wire on the probe should be less than 5 mm. Ensure external noise from the system is not coupled 

into the oscilloscope probe. 

2.

V

TT

 must be provided using a separate voltage source and not be connected to V

CC

. The voltage 

specification requirements are defined across VTT_SENSE and VSS_SENSE_VTT lands at the processor 

socket vias on the bottom side of the baseboard. The requirements across the SENSE signals account for 

voltage drops and impedances across the baseboard vias, socket, and processor package up to the 

processor Si. The voltage specifications are measured with a 20-MHz bandwidth oscilloscope, 1.5 pF 

maximum probe capacitance, and 1 M minimum impedance. The maximum length of ground wire on the 

probe should be less than 5 mm. Ensure external noise from the system is not coupled into the oscilloscope 

probe.

V

TT

Voltage for the memory controller 

and shared cache defined at the 

socket motherboard VTT pinfield 

via.

1.045

1.10

1.155

V

1

Voltage for the memory controller 

and shared cache defined across 

VTT_SENSE and VSS_SENSE_VTT.

1.023

1.10

1.117

V

2

V

DDQ

Processor I/O supply voltage for 

DDR3 

1.425

1.5

1.575

V

V

CCPLL

PLL supply voltage (DC + AC 

specification)

1.71

1.8

1.89

V

I

TT

Intel Xeon processor 3400 series 

with 95 W TDP: Current for the 

memory controller and Shared 

Cache

—

—

35

A

I

TT

Intel Xeon processor 3400 series 

with 45 W TDP: Current for the 

memory controller and Shared 

Cache

—

—

27

A

I

TT_TDC

Intel Xeon processor 3400 series 

with 95 W TDP: Sustained current 

for the memory controller and 

Shared Cache

—

—

30

A

I

TT_TDC

Intel Xeon processor 3400 series 

with 45 W TDP: Sustained current 

for the memory controller and 

Shared Cache

—

—

22

A

I

DDQ

Processor I/O supply current for 

DDR3

—

—

6

A

I

DDQ_TDC

Processor I/O supply sustained 

current for DDR3

—

—

6

A

I

DDQ_STANDBY

Processor I/O supply standby 

current for DDR3

—

—

0.650

A

I

CC_VCCPLL

PLL supply current

—

—

1.1

A

I

CC_VCCPLL_TDC

PLL sustained supply current

—

—

0.7

A