Asus Strix Rog GL753ve-ds74

Hey guys my friend and I recently bought a used Asus Strix R9 380 2 gb OC and when we turn it on the light fades from white led to the red one and it stays red. The LEDs in question are the one next to the 8 pin power input. What do those mean? are they for troubleshooting or???

I have a pc with two drives set to raid mirror. After a year of use the motherboard failed and sent it in for a free repair/replacement. When I hooked it back up it would not recognize the raid I had already set up anymore. It booted fine to windows on the drive. Is there a way to turn raid back...