BIOS for VT-x

I want to acquire an E8500 Processor (Core 2 Duo) and a MB with G41, Q43 or Q45 chipset. Mutually processor and chipsets are proclaimed to support VT-x. Having interpret that the critical point is that many motherboards have a BIOS with no support for VT-x I searched for info about that, but could not find any. I tried to search an information on motherboards with BIOS supporting VT-x but didn't find any appropriate results for that. I am having this problems because I am not having any knowledge about the CPU virtualization od an Intel. So please provide some information about it. :rolleyes:

The instructions dedicated to virtualization (Intel VT-x) are needed to use a feature of Windows 7, which enables a virtualized Windows XP. This option is used on the professional version and is intended primarily for programs incompatible with Windows 7. And the problem is that some Intel processors are not equipped with the instructions in question. The term virtualization, its very fashionable lately, is not so new. We talk for several years of "virtual private networks (VPN), or storage virtualization SAN environments. The principle of the virtualization system is not new. The objective of x86 virtualization systems, is to provide an abstraction layer to isolate the hardware and operating system. Thus, the operating system is running in what is called a virtual machine.

In the systems known as "traditional" operating system is linked to the material. These are pilots who can exploit the specific materials. Each image of the installation of operating system is specific to the hardware on which it is executed. The virtualization allows to make the operating system independent of the physical machine on which they are executed because the material submitted by the virtual machine virtualization system is generic. Virtualization systems can create multiple virtual machines. This is called "partitioning" of the machine on which virtual machines were performed. They are completely isolated from one another. The virtualization system may allocate and material resources between different virtual machines. Operating systems installed in virtual machines can be different (Windows, Linux, etc..).

In the incompatible models, we find the Q8200, Q8300 some, the Core 2 Duo E4xx, Core 2 Duo E8190 and Core 2 Duo part of E7xx (the E7600 is compatible, as some E7500 and E7400). Finally, the Pentium E2xxx are incompatible, are in part E5xxx and E6300 is. The novelty comes from the series of processors that are available in two versions: the old Q8300, E5300, E5400, E7400 and E7500 were all incompatible (boxed or OEM version), then added the Intel VT-x compatibility with the models sold in OEMs (and thus found in the machines assembled by manufacturers such as HP, Dell, etc..) before, most recently, adding the instructions in the models sold in boxes (BOX). Finally, there is hope that the majority of the Intel (outside the Celeron, which is quite logical) will be compatible VT-x launch the final version of Windows 7.

The virtualization system may apportion and material resources stuck between different virtual machines. Operating systems installed in virtual machines can be dissimilar. This also allows to separate the operating system of material management, protection against failures and to precisely control the resources to maintain performance. It is the virtualization system that supports these tasks. Physically, a virtual machine is composed of files. It then becomes possible to record the entire state of a virtual machine files. Moving and copying a system therefore comes down to copy files.

A first category of its products installed as an application on the Linux operating system or Microsoft Windows. It is from this software it becomes possible to create a virtual machine which will be installed an operating system. It is a virtualization system called "Host-Based". It is based on a "host". In other words, it is running on a host operating system.

The second family of virtualization systems, unlike the former, no longer uses the operating system. The virtualization system is itself act as the operating system. This is called a "hypervisor". They are called "native hypervisor" or are known as type "bare-metal", that is to say, close to the material.

Virtual machines are called guest operating system "or" guest operating system "in reference to the hosts. Host-based Architecture has several advantages :

• It's easy to install, generally installed as a conventional application
• Compatibility is maximum
• It supports many devices as it relies on drivers provided by OS

Unfortunately, this architecture suffers from a significant lack of performance related to the number of layer that must pass through the data and instructions from the virtual machine to access the hardware, including disk and memory. For its part, the architecture of the bare-metal type overrides some of its limitations :

• Performance is much better because the hypervisor consumes very few resources, it was built in this sense
• Device drivers have been optimized to run virtual machines
• The kernel is more secure in structure and with less exposure
• Advanced features are available as VMotion or XenMotion

If you checked you could not screw the heatsink? Before changing it you should know the logic(principal) of it. Role of competently relocating heat sinks thermal energy ("heat") of an object at elevated temperature to a second object in a minor temperature with a much higher heat capacity. This brisk transfer thermal energy quickly fetches the first object in thermal equilibrium with the second, lowering the temperature of the initial object, fulfilling the role of the heat sink and cooling device. The well-organized operation of a heat sink hopes rapid transfer of thermal energy from the first object to the heat sink and the heat sink to the second object.

It can seem strange to simulate several machines in one: an operating system is normally designed to use the best equipment that is entirely under his control. For this reason, it seems at first glance that this approach leads to inefficiencies plus the fact that the process of virtualization itself will consume resources. This is not quite correct. On the one hand, it avoids many of these inefficiencies just have different disks for each system where possible, and secondly the cost of memory allows each system to remain resident, and sometimes even with large sections of code shared. Furthermore, the firmware of mainframes as microprocessors include more and more features that make virtualization more efficient.

Finally, it is common for a company to have fifteen servers running at 15% capacity, the latter being there to meet at any time with peaks sporadic. A server loaded to 15% do not consume much less power than a server that is responsible for 90%, and group 4 servers on one machine can be profitable if their peak loads do not always coincide, although 30 % of the load machine is represented by the virtualization itself. Finally, server virtualization allows a much greater versatility in load distribution and reconfiguration of servers in case of changes or temporary fault (emergency plan, etc..).

Each virtualization tool implements one or more of these concepts :

• HAL and / or software
• host operating system (installed directly on hardware)
• operating systems (or applications, or application set), "virtualized (s)" or "guest (s)"
• partitioning, isolation and / or sharing of physical resources and / or software
• manipulated images: start, stop, freeze, cloning, backup and restore, backup context, migration from one physical machine to another
• virtual network software-only network, internal to the host machine, between host and / or guests

To get an idea of theoretical performance of applications on top, compare vertically stacking layers. It is possible to extend the schema by adding virtualized environments also consume resources of the host. An isolator is a software to isolate applications run in what are called contexts or areas of performance. The isolator allows to run several times the same application in a Multi-instance (multiple instances of execution) even though it was not designed for it. This solution is very efficient because of low overhead (time spent by a system unable to do anything other than manage themselves), but virtualized environments are not completely isolated.

A hypervisor is a type 2 software (usually quite heavy) running on the OS guest. This software allows you to launch one or more guest OSs. Virtualizes the machine and / or emulate the hardware for the guest OS, they believe that interact directly with hardware. This solution is very similar to an emulator, and sometimes confused. However, the central computing unit, is to tell the microprocessor, working memory (RAM) and memory storage (via a file) are directly accessible to virtual machines, while on an emulator the CPU is simulated, the performance is considerably reduced compared to virtualization.

A hypervisor Type 1 is a lightweight system kernel and optimized to manage the access of guest OS kernels to the underlying hardware architecture. If the guest OS running in the awareness of being virtualized and are optimized for this, it is called paravirtualization (indispensable method on Microsoft Hyper-V and increases performance on VMware ESX for example). Currently, the hypervisor is the method of the virtualization infrastructure more efficient but has the disadvantage of being cumbersome and costly, while allowing more flexibility on the virtualization of a data center.