Dear Friends
I want to inform comunity, the Zotac GTS 450 1GB work fine with celsius M460 Workstations.
Bios Versione BIOS 6.00 12-2608.A1 last official release.
But work also with Service bios Versione BIOS 6.00 R1.12-04.2608.A1
Perfect boot, no beep.
Alberto