Intel E5-4650 BX80621E54650 ユーザーズマニュアル

Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families

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Datasheet Volume One

Intel® Virtualization Technology (Intel® VT) makes a single system appear as multiple 
independent systems to software. This allows multiple, independent operating systems 

to run simultaneously on a single system. Intel VT comprises technology components 

to support virtualization of platforms based on Intel architecture microprocessors and 
chipsets. 

• Intel® Virtualization Technology (Intel® VT) for Intel® 64 and IA-32 

Intel® Architecture (Intel® VT-x) adds hardware support in the processor to 

improve the virtualization performance and robustness. Intel VT-x specifications 

and functional descriptions are included in the Intel® 64 and IA-32 Architectures 
Software Developer’s Manual, Volume 3B

• Intel® Virtualization Technology (Intel® VT) for Directed I/O 

(Intel® VT-d) adds processor and uncore implementations to support and 

improve I/O virtualization performance and robustness. The Intel VT-d spec and 
other Intel VT documents can be referenced at 

.

Intel VT-x provides hardware acceleration for virtualization of IA platforms. Virtual 
Machine Monitor (VMM) can use Intel VT-x features to provide improved reliable 

virtualized platform. By using Intel VT-x, a VMM is: 

• Robust: VMMs no longer need to use para-virtualization or binary translation. This 

means that they will be able to run off-the-shelf OS’s and applications without any 

special steps.

• Enhanced: Intel VT enables VMMs to run 64-bit guest operating systems on IA x86 

processors.

• More reliable: Due to the hardware support, VMMs can now be smaller, less 

complex, and more efficient. This improves reliability and availability and reduces 
the potential for software conflicts.

• More secure: The use of hardware transitions in the VMM strengthens the isolation 

of VMs and further prevents corruption of one VM from affecting others on the 

same system.