﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
8474	Performance and stability problems on new i7 CPUs (Mac OS X)	Nathan Blair		"Hi,
As noted in the forum post at http://forums.virtualbox.org/viewtopic.php?f=8&t=39368, VirtualBox is very slow and leads to host OS freezes on machines with new i7 CPUs (including quad core MacBook Pros and 12-core MacPros).

Disabling VT-x helps with the extremely bad performance, but eventually the host OS will lock up.

I have attached a vbox log file here.  This log file was created while booting a pristine windows XP guest and then shutting it down, with VT-x enabled.  Guest additions are installed.  The entire this guest was running, the CPU on the host OS spiked to 100%."	defect	closed	other	VirtualBox 4.0.4	fixed			other	Mac OS X
