I bought a Seasonic S12-430 from scan.co.uk a week or two ago, and it seems to be the new version with sleeved cabling and 4 S-ATA connectors. However my PC refuses to boot with this power supply and a Foxconn NF4K8AC (NForce4, Skt 939) motherboard. The fans (PSU, CPU, case fan) spin for a second or...