﻿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
