I have a 2003 32 bit server with dual cores right now. since the correct HAL should already be loaded I should be able to replace these with quad cores. That said, how does the 32 bit server relate to using these? Is the 32 bit / 64 bit battle more alligned to how much memory can be addressed and rather than the performance of a CPU?Thanks.

Well server 2003 does have it's limitations of memory AND CPU's.Here's an overview of the CPU support for Windows 2003:Win 2003 Small Business Edition: 2 CPUs [or Cores]Win 2003 Web Edition: 2 CPUs [or Cores]Win 2003 Standard Edition: 4 CPUs [or Cores]Win 2003 Data Center Edition: 8 CPUs [or Cores]Win 2003 Enterprise Edition: 32-bit 32 CPUs [or Cores]Win 2003 Enterprise Edition: 64-bit 64 CPUs [or Cores] Windows Server 2003 (and SP1), Standard Edition 4 GB of physical RAM* Windows Server 2003, Enterprise Edition 32 GB of physical RAM Windows Server 2003, Datacenter Edition 64 GB of physical RAM Windows Server 2003 SP1, Enterprise Edition 64 GB of physical RAM Windows Server 2003 SP1, Datacenter Edition 128 GB of physical RAM * Total physical address space is limited to 4 GB on these versions of Windows. Jack CobbenMCTS, MCITP SAhttp://www.jackcobben.nl