3tb HDD not detected

Need your help guys!

I recently bought a 3TB WD Caviar Green Internal HDD. When i enter BIOS it's not showing the drive. As far as i know, i need to change it to GPT in order for windows to recognize it in the disk management but if the system doesn't see it how can i do it. BTW, my current system is listed below. I know my MOBO supports it. Just can't figure out how to activate it.

i7-3770k Intel
CM EVO 212 120mm CPU Cooler
ASUS Sabertooth Z77 LGA1155
4x4GB Patriot Venom Series 3 VENOM
EVGA GTX680 2GB SC Signature+
Corsair TX750
128GB Crucial M4 SSD - boot drive
2 x 1TB WD Caviar Green Internal HDD - raid storage

I'm still kinda newbie when it comes to BIOS settings. Any help is much appreciated.

THANKS!
2 answers Last reply
More about detected
  1. The drive does not have to have a GPT partition in order for Windows to recognise it.
    A GPT partition is just a more flexible alternative to the more widely used MBR partitioning method.
    Windows can recognise both types.

    The problem you need to focus on is why your computer BIOS is not recognising the drive. Make sure you've connected it up properly.
  2. it's connected definitely... i don't know why it's not showing up even in the BIOS
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