Long time to boot and BSOD

[123Mags456]

Apologies if this is in the wrong place, unsure if it's hardware, driver or OS related.

Having a strange issue. PC worked fine this morning, turned it on just now and it got as far as the Jmicron controller saying "detecting drives please wait"
Normally this takes seconds, however it now takes about 2 minutes. Eventually windows boots as normal. I made no installs or updates between the time i used the PC last.

Once windows has booted I keep getting BSOD's - specifically "device_driver_power_failure"
I have also noticed a drive not showing, I have an old IDE drive i keep documents etc from previous formats on
Not sure where to start on this one as i'm new to windows 8, any suggestions?

PC specs as follows:
Win 8 Pro (genuine copy!) 64 bit
Intel i5 2500K 3.3GHZ
G Skill 8GB (2x4GB) DDR3 1333mhz Ripjaws Memory Kit CL9 (9-9-9-24) 1.5V (although only currently running one as the other is being RMA'd)
Asus P8P67-M R3.0 Socket 1155 8 channel Audio ATX Motherboard
Asus GTX 570

Drives:
1 OCZ Vertex SSD
2x WD black caviar in RAID0
1x IDE