The question coldbug and 'very delicate especially on AMD cpu dualcore home, but it' a problem that occurs randomly, so it can 'be lucky to have a CPU that works in a certain range of temperatures below zero, or its cpu already 'at 0 ° C will not work'.
my advice and then 'to reflect the purchase, basically the system that we produce and' compatible with all available platforms except the socket, so it must be seen as a stable purchase, say as a power supply of high level, that a Once you purchased does not change more 'for some' time.
Other considerations and 'alongside the other hand, if we orient ourselves to the new dual core CPUs (Core 2) Intel who are deprived of coldBug and very attractive for use with Phase Change.