BIOS problems after PSU uppgrade

[Bird_Raymond]

I just bought a new AX760I PSU for my PC, I then installed everything to a new Corsair Carbide Air 540. When i start my PC I get a warning messege containing the following messege:

"WARNING: The current BIOS setting does not fully support the boot device. Go to Advanced > Boot > CSM Parameters, and adjust the CSM settings enable the boot device"

System specs are as follows:

MB: ASUS ROG Maximus V Gene

CPU: Intel i7 3770k @3,4Ghz

RAM: 12 GB

GPU: Nvidia Geforce GTX 660 1,5 GB

Hard Drive: Seagate 1 TB

PSU: Corsair AX760I

Chassi: Corsair Carbide Air 540

BIOS version: 1707 x64

OS: Windows 8 64 bit

The only difference between my new case and the old one it that the only way to mount a 3,5 inch drive is via hotswap, where as in my previos case i connected the drive to the MB via a 6GB Sata cable.

Thank you for any help in advance.

[Bird_Raymond]

After som brainstorming I simply decided to remove the hotswap port and run a 6GB/s sata cable, which seemed to fix the problem