P55 GD 80 - only sees 4GB of 8GB RAM - G.Skill F3-16000CL9D-4GBTD

I have just built a system with aP55 GD 80 - and it only sees 4GB of the installed 8GB RAM. I have not yet installed an OS, I am just POSTing and going into BIOS, and BIOS says there are 4GB physical memory.
This is G.Skill F3-16000CL9D-4GBTD memory, (4 sticks of 2GB each).
I upgraded the BIOS to 1.5 and it made no difference.
Also, interestingly, if I only run 2 sticks, it sees 2GB instead of 4GB (regardless of which 2 sticks) -- so it's as if it thinks each stick is just 1 GB.
Can anybody give me pointers of what I might be able to do about this?
I've read that some people are trying newer beta BIOS versions (newer than 1.5) to resolve memory problems - where can I download those?
thanks a bunch!

Dont buy the wrong RAM 2 x (2x2GB) for 8GB use !
Charges can be different.
Thats the right way. Buy 8GB kits only guys!!!(for every P55 system)->
example:
http://geizhals.at/deutschland/a486589.html
http://geizhals.at/deutschland/a486985.html
http://geizhals.at/deutschland/a454453.html
http://geizhals.at/deutschland/a453903.html
Bios shows 4GB(2) instead 8(4)GB:
Test every module with memtest 4.0 on errors http://www.memtest.org/ 2hours !!!
Put CPU out, control your socket pins, mount cooler and look if 8GB function is proper,control RAM socket.
Flash newest Beta .173 with only 1 or 2 RAM sticks http://msi-forum.de/index.php?page=Thread&postID=727333#post727333 (you must register in forum,or ask a mod here in the HQ forum for Beta
.173) , now put all 4 modules in the RAM bank, cmosclear.
merry xmas

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(97356)

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P55 GD 80 - only sees 4GB of 8GB RAM - G.Skill F3-16000CL9D-4GBTD

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