CHAPTER 1 Product Overview
1.4 Hardware technologies
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CA92344-0534-07
The PRIMEQUEST 2000 series supports the following Intelligent Power Technologies.
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Enhanced Halt State
This function reduces the CPU power consumption by lowering the core/ clock frequency ratio and core
voltage of the CPU in the idle mode, according to the instructions of the OS.
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Demand Based Switching
This function changes the combination of operating voltage and the clock of the CPU, called the P-State
to reduce the power consumption.
-
Turbo Boost Technology
When more than one CPU core is idle, this function increases the frequency of the running CPU core to
a higher than specified frequency, within the Thermal Design Power (TDP) range.
Enhanced Speed Step
Enhanced Speed Step is a function that changes the operating frequency according to the load of each core
in the CPU. The default value is “enabled”.
In PRIMEQUEST 2400E3/2800E3/2800B3/2400E2/2800E2/2800B2, Enhanced Speed Step has following
features:
-
Each core in the socket can have different frequency each other.
-
Threads in the core can have only same frequency.
In PRIMEQUEST 2400E/2800E/2800B, Enhanced Speed Step has following features:
-
Each socket in the partition can have different frequency each other.
-
Cores in the Socket can have only same frequency.
1.4.2 QuickPath Interconnect (QPI)
The PRIMEQUEST 2000 series uses a high-speed system bus called Intel ® Quick Path Interconnect (QPI)
to communication between CPUs in a partition.
The resource can be increased by connecting peer CPUs by the QPI.
1.4.3 Hyper Threading Technology Function
PRIMEQUEST 2000 series supports the function of hyper-threading technology. In hyper threading
technology function, a single processor core does the work of multiple processor cores when viewed from
the OS, thereby improving CPU performance.
-
In PRIMEQUEST 2400E3/2800E3/2800B3, this function supports up to two threads per core and up to
48 threads for each CPU (24 cores).
-
In PRIMEQUEST 2400E2/2800E2/2800B2, this function supports up to two threads per core and up to
36 threads for each CPU (18 cores).
-
In PRIMEQUEST 2400E/2800E/2800B, this function supports up to two threads per core and up to 30
threads for each CPU (15 cores).
Enabled/disabled of the [Hyper-Threading] is set from the [CPU configuration] menu of the UEFI.
-
Enabled (Default value)
-
Disabled
For details on the hyper threading technology function settings, see ‘3.4.4 [CPU Configuration] menu’ in the
“
PRIMEQUEST 2000 Series Tool Reference
” (CA92344-0539).
1.4.4 Memory Mirror Functions
The memory is duplicated and the data is written to both of duplicated memories. Even if an uncorrectable
error occurs in one memory, the data in the other memory can be used. This prevents the data errors which
