![]() There’s no performance increase for a running VM but Gen 2 lets you boot from a SCSI VHD(X) so IDE is no longer necessary, it also boots about 20% faster and installs the OS up to 50% faster. A Gen 2 has much less emulated hardware because the guest OS understands that it’s running in a VM. If you look at Device Manager in a VM today there’s all sorts of PS/2 ports, serial ports and other devices that have to be emulated so the VM “thinks” its running on physical hardware. The main difference is that with UEFI, Secure Boot is now an option (and the default) and there’s much less emulated hardware. ![]() Generation 2 is only supported by Windows 8 / 8.1 and Windows Server 2012 / 2012 R2 as the guest OS but is clearly the way forward. The former is the same VM type that we have today, whereas Gen 2 is based on a UEFI. The new Hyper-V brings the option to create a Generation 1 or Generation 2 VM. Picking the generation of your VM is easy, just make sure the guest OS supports living in a Generation 2. ![]()
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