According to Microsoft (source: http://support.microsoft.com/kb/888732), both 32 and 64-bit editions of Windows XP support up to 2 physical processors.
Windows XP supports multiple CPUs out of the box. No further adjustment is needed.
none
More than 64. hope that helps. =]
Windows xp will support 127 usb ports
Pentium II, Athlon XP, Pentium 4 Celeron, Pentium Extreme Edition
two
Windows XP Professional supports up to two processors
All which has copitable hardware
It support maximum of 4 processors By. V.ARAVINDRAJ
Unfortunately, there's not a simple answer to this. The Linux kernel can be compiled to support any number of CPUs. According to some distribution-specific support documents I found in researching this answer, the number ranges from 1-4, 64, 1024, and 'unlimited' in the case of Red Hat Enterprise Linux. When the Kernel is compiled, there is a configuration directive passed to the compiler ('NR_CPUS') that determines the maximum number of CPUs supported. My suggestion is to research your specific distribution and see what the developers compiled the kernel to support. It should be readily available on their documentation (I was able to find this easily for many common distributions).
No motherboard has one slot of RAM
On Intel CPUs which support IA-32 , the best is Protected Mode. But as for Intel CPUs supporting IA-32e ,the best is 64-bit Mode.