Eh si, era proprio questo il problema:
Fix A7N8X system fails to resume from S3 when using ATI RADEON 8500DV AGP VGA card.
Add "Dual Channel mode" or "Single Channel mode" string on POST screen.
Support new CPUs. Please refer to our website at:
http://www.asus.com.tw/support/cpusu...pusupport.aspx
Fix Win98 system shuts down fail if USB mouse legacy item in BIOS setup is enabled.
Fix large data transfer failed under Win2K and WinXP with hard disks configured as RAID0.
Grazie a tutti x l'aiuto.