LSI Raid card not detected on HP ML10v2

[monish]

The LSI raid controller 8888elp is not detected by the BIOS on booting it also makes long beeping sound on POST. I even tried to update the firmware on the raid card and updated my BIOS as well .The LSI raid controller works well on my other system with UEFI BIOS.

I am banging my head against the wall to figure this out.... Please help.

 

[Patriot]

I have had no problems with lsi HBAs in that box... but mine were all modern.
Might try forcing pcie 2.0 in the bios?

 

[monish]

Might try forcing pcie 2.0 in the bios?

How do I do that? The LSI raid card in not recognised by the BIOS.