You need to install your OS onto one of the HDD's.
Although you have XP installed on one of the HDD's, effectively you have a "virgin" PC without an OS as your existing HDD doesn't recognize the new mobo.
This thread is now locked and can not be replied to.
How to get Windows 10 for free | How to install Windows 10: There is still a way to avoid paying…
1995-2015: How technology has changed the world in 20 years
Alex Chinneck’s giant ice cube Christmas tree at Kings Cross
Apple rumours & predictions 2017: The iPhone 8, new iPads, and everything else you should expect fr7…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.