ML350 G6 boot problem

[Povi]

Greetings!

I have an ML350 G6 workstation that want to speed up.
I put them in a SSD with PCI-e interface, and they offered to HP Z turbo drive card, but I think it is worth nothing, until you can boot from it. Specifically, the card can do it, but the server does not.
The Windows installer can see the card, but writes that the device is not bootable.
I could not find any settings in the BIOS which would make this possible.
Somebody's idea? How the G6 was persuaded to start a PCI-e card?
I thanked for all help.

Povi