I have a strange problem on a HP z600 with dual Quadcore Xeon @2,93 Ghz with HT, OS is Windows 7 Ultimate x64.
CPU-z can see correctly two cpus with 4 cores but with only 4 threads.
I checked BIOS settings and I enabled HT and multi cpu support, than with CPU-z i can see only 1 processor with 4 cores and 8 threads.....
On msconfig>boot>advanced options>Number of processor the scroll-down show from 1 to 8 as maximum.
Testing with cinebench or frybench only 8 cores are working instead of 16.....
Where is the problem?