Format new 4TB drive - Help

hddhelp

Honorable
Dec 4, 2013
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I just picked up a WD 4TB red drive and when I open Disk Management I initialized Disk 0 as GPT. The problem is it's only showing up as 2TBs of unallocated space. How do I get Disk Management to see all 4TB so I can format it as a single drive?

I have an asus p6x58d premium motherboard running Windows 7. If I run WD Data LifeGuard Diagnostics I see the drive as 4001GB but windows isn't seeing it right.

Thanks.

Edit: I found this post on the Asus knowledge base for my motherboard that says all I needed to do was initialize the HDD as GPT but Windows still doesn't see the full 4TB:
http://support.asus.com/FAQ/detail.aspx?SLanguage=en&m=P6X58D%20Premium&p=1&s=29&os=&hashedid=wurRaDZ8lo4Ckukj&no=B2EED94B-A58D-05F5-0DAF-864FC6F34066

Any ideas?