hello Richard,

> If the machine is going to be a FB/IB only server

no, the actual machine is for development only, and CPUAffinity in
firebird.conf is already set = 1.

Anyway I have tried to momentarily turn off HT, but the machine
becomes almost unusable (taking 5-7 minutes only for boot), maybe
because I'm also running Seti@home client, which takes almost all the
cpu for itself (but only 50% with HT on). If I close Seti client the
machine returns at a normal usability. But the strange thing is that I
run Seti client also on the second older machine with a P4 2 GHz. that
doesn't have HT at all, and that machine is perfectly usable even if
cpu usage is 100%.

Thank you for the information.

Best regards
Salvatore