Asus has released new bios updates for the CUSL2, CUEP2, and CUV4X series:

Bios CUSL2 with OnB. Audio 1008 Final (=1008 - 10 Beta)
Bios CUSL2 without OnB. Audio 1008 Final (=1008 - 10 Beta)
Bios CUSL2-C(A) with OnB. Audio 1008 Final (=1008 - 10 Beta)
Bios CUSL2-C without OnB. Audio 1008 Final (=1008 - 10 Beta)
Bios CUSL2-C(B) Black Pearl 1008 Final (=1008 - 10 Beta)
Bios CUSL2-M / -LS ( i815e ) 1008 - 10 Beta
Bios CUEP2-M ( i815ep ) 1008 - 10 Beta
Bios CUV4X-D 1013 - 02 Beta
Bios CUV4X-DLS 1013 - 02 Beta ( LSI SCSI BIOS v4.19.00 )

Download