Win 7 Unable to see 3TB drive

Have a Win 7 64bit HP dc5850.  Just picked up a seagate 3TB drive.  Wanted to connect it to my computer via a usb drive reader.  The OS picks up the drive as a generic 746GB drive.  I have converted from MBR to GPT and reformatted but that did not help.  Any suggestions?
odddballAsked:
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Run5kConnect With a Mentor Commented:
I have heard of people who have encountered almost identical scenarios:

Tried to use my 3TB drive in a USB enclosure, now reports only 746GB even internally

If you wanted to try the same fix action, you can boot into an alternate operating system environment like the Parted Magic LiveCD. It's a freeware Linux-based environment that includes Gparted:

http://partedmagic.com/doku.php

And for those of us who may need it, here is a short Parted Magic tutorial in PDF format:

http://www.jhhcvandermeijs.nl/linksandreviews/partitions.pdf
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IanThCommented:
your not the only one
http://www.evga.com/forums/tm.aspx?m=882909&mpage=1

there is something about seagate if you go down a bit
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Dave BaldwinFixer of ProblemsCommented:
We had another question like this last month.  Turned out on that machine that the BIOS and hardware wouldn't support anything over the 2.19TB limit.  Look here http://www.experts-exchange.com/Hardware/Servers/Q_27434893.html and there are several links in that question.
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odddballAuthor Commented:
Thank you all for your help.  Used the Parted Magic and all is well!
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Run5kCommented:
Glad to help!
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