Sanghai with Windows XP x64 Problem

Discussion created by Mrxlazuardin on Mar 23, 2010
I'm using Supermicro OfficeBlade which consist some SBA-7141M-T modules. Each module consist 4 Opteron 8378 (Sanghai 2.4Ghz) processors. The BIOS acknowledges processors as 16 CPUs. But, on Windows XP x64 Task Manager, I just see 8 CPUs graphic. Is this OS limitation or processor damages ?
Best regards,