EDIT:
Never mind, the HDD's was not connected to ports 1-4 - it was 4-8. Got it working!
Heya, just got my hero / 4770K combo and been trying to setup 2x2GB samsung HDD's in RAID (OS is on a SSD)
Enabled RAID-mode and UEFI drivers first as the guide suggests, reboot
When creating a RAID, the Samsung HDD's are missing from the list, can only see my SSD and my 1TB WD hdd
In windows, the intel storage manager also only lists the SSD and WDC, weird considering the Samsungs works fine in windows explorer
The drives are connected to Sata ports 1-4
Any ideas?