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IntelP®P Server Board S3420GP TPS 
Functional Architecture 
 
The server
3.1.2 Intel  Turbo Boost Technology 
Inte
 Boost
 certain processors in the Intel
®
 Xeon
®
 Processor 
ster than the marked frequency if the processor is operating below power, 
temperature, and current limits. This results in increased performance for both multi-threaded 
and n
Intel  Turbo Boost Technology operation: 
ƒ
 
t operates under Operating System control – It is only entered when the 
 is independent of the number of active cores. 
ƒ
The amount of time the system spends in Turbo Boost operation depends on workload, 
o
If th
o
S Setup provides 
an o
3.1.
 (SMT)  
Mos
t
ts 
le or disable 
this
 The d
3.1.4 
Enhanced In
®
 Xeon
®
 processors support the Geyserville3 feature of the Enhanced Intel SpeedStep
®
 
chnology. This feature changes the processor operating ratio and voltage similar to the 
Thermal Monitor 1 (TM1) feature. The BIOS implements the Geyserville3 feature in conjunction 
with the TM1 feature.
 
The BIOS enables a combination of TM1 and TM2 according to the 
processor BIOS writer's guide. 
3.2 Memory 
Subsystem 
The Intel
® 
Xeon
®
 3400 series processor has an Integrated Memory Controller (IMC) in its 
package. Each Intel
®
 Xeon
®
 3400 series processor produces up to two DDR3 channels of 
memory. Each DDR3 channel in the IMC supports up to three DDR3 RDIMM slots or up to two 
UDIMM slots. The DDR3 RDIMM frequency can be 800/1066/1333 MHz. DDR3 UDIMM 
 board does not support previous generations of the Intel
®
 Xeon
®
 processors. 
®
l
®
 Turbo
 Technology is featured on
3400 Series. Intel
®
 Turbo Boost Technology opportunistically and automatically allows the 
processor to run fa
 si gle-threaded workloads. 
®
Turbo Boos
operating system requests the highest (P0) performance state. 
ƒ
 
Turbo Boost operation can be enabled or disabled by BIOS. 
ƒ
 
Turbo Boost converts any available power and thermal headroom into higher frequency 
on active cores. At nominal marked processor frequency, many applications consume 
less than the rated processor power draw. 
ƒ
 
Turbo Boost availability
ƒ
 
Maximum
 Turbo Boost frequency depends on the number of active cores and varies by 
processor configuration. 
 
perating environment, and platform design. 
e pr cessor supports the Intel
®
 Turbo Boost Technology feature, the BIO
ption to enable or disable this feature. The default state is enabled. 
Simultaneous Multithreading
t In el
®
 Xeon
®
 processors support Simultaneous Multithreading (SMT). The BIOS detec
processors that support this feature and enables the feature during POST.  
If the processor supports this feature, the BIOS Setup provides an option to enab
 feature.
efault is enabled. 
tel SpeedStep
®
 Technology 
Intel
te
Revision 1.0 
 
Intel order number E65697-003 
 
15