"v. Hessberg" wrote in message news:fpespd$lia$1@news01.versatel.de...
> Can Win XP use all four CPUs in a INTEL Quad?
The eula.txt file says (for which you should have a copy under
%windir%\system32):
"The SOFTWARE may not be used by more than two (2) processors at any
one time on the COMPUTER, unless a higher number is indicated on the
Certificate of Authenticity."
There is no mention of physical versus virtual (hyperthreaded)
processors or how many cores within a processor. In the registry:
key = HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session
Manager
data = LicensedProcessors
value = 2
So only 2 physical processors are supported. This is counted by the
sockets, not by cores within a processor. Windows XP Pro supports 2
sockets. Thinking of sockets makes it easier to understand because
users confuse cores with processors. You have 4 cores within 1
processor.
So you could put in 2 processors with quad cores for a total of 8
cores. Read:
http://www.microsoft.com/licensing/h...multicore.mspx
which says, "Windows XP Professional can support up to two processors
regardless of the number of cores on the processor."
Linear Mode
