hard drive - Gradual loss of RAM, CPU fan, HDDs. Possible suspect motherboard?

I've been having quite some unsettling issues with my desktop recently
In the last 6 months up until now I've had an alarmingly growing rate of malfunctions.

In chronological order:

• RAM started cutting out, wouldn't show full amount of RAM on system
  info. (Disappeared until today's return)


• BSOD's regarding RAM (Frequent)


• On boot will start up, power down and restart 1-3 times before completing boot-up.
  (Permanent)


• CPU Fan malfunction, no longer starts on its own and needs a manual kickstart. (Recent, permanent)


• Total CPU Fan malfunction, no longer operates, even after manual kickstart. (Recent, permanent)


• Harddrives cutting out, 4 out of 6 no longer showing in Windows. States they are corrupt or wrong file format and need a formatting. (Note: The only drives not cutting out
  are SSD's on SATA6 chip) (Just now)

All of these issues lead me to a motherboard malfunction. I doubted up until 4 drives just decided to be inaccessible after a few hours.

My current PC specs:

• OS: Windows 8 64-bit (6.2, Build 9200) Case: Cooler Master HAF 932


• Motherboard: ASUS Rampage III Extreme


• RAM: Corsair Dominator 6GB DDR3-1600 CL8 kit (3x2GB)


• CPU: Intel Core i7 960 (@ Factory clock) CPU Fan: Scythe Mugen 2 Rev. B


• GPU: 2x SLI MSI N580GTX Lightning


• Soundcard: Asus ROG Xonar Phoebus SSD: 2x OCZ Agility 3 120GB


• HDD: 2x RAID0 Seagate Barracuda 1TB, 2x RAID0 250GB 7200rpm WD


• PSU: Corsair TX950W

The total computer is about 3 years old, except for the older, smaller hard drives which came from my desktop before that. This desktop was built myself.

Troubleshooting steps taken:

• Tons of reboots


• RAM re-positioned, connectors cleaned


• Newest BIOS installed


• Motherboard reset


• Fan cleaned and serviced with contact spray Fan power socket swapped Checked if cables were properly connected


• Cut power from computer entirely, gave capacitors a chance to empty, restarted.


• Reverted BIOS to factory settings.

I'm at the point of losing sanity right now. Everything is dying and I have no clue why it is or how I prevent it. I do not have the budget to splurge on replacements parts since I'm a student and this desktop was a hefty investment for long-term use.
Now I'm looking for input to help pinpoint and hopefully resolve the problem. I will happily take any suggestions!

TL;DR

RAM failing, frequent RAM related BSOD's, CPU fan failing, 4/6 hard drives inaccessible. Prime suspect = faulty motherboard.