nforce4 6.66 on A8N-SLI Premium integration succeeded with no concerns using 1.0b5 My System: ASUS A8N-SLI Premium, AMD FX-55 Clawhammer processor, ASUS EAX850XT PE 256mb PCIe, Audigy 2 ZS, Sony LCD SDM- HS95PS, DVI, Corsair TwinX1024LL 3200 Professional, 4*WD 74G Raptors in RAID0 on nforce4 chipset, Lian-Li PC-75 case, 2*LG 4163 DV-RW, Panosonic floppy, Sycom 1000va UPS, Enermax EG701AX-VE SFMA 2.0 (600W) Power Supply, Labtech 580e 5.1 THX speaker system, HP Deskjet 940C